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Removing and Replacing Parts: Dell PowerEdge 2400 Systems Service Manual
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Removing and Replacing Parts: Dell™ PowerEdge™ 2400
Systems Service Manual
This section provides troubleshooting procedures for components inside the computer.
Before you start any of the procedures in this section, perform the following tasks:
- Perform the procedures described in "
External Visual Inspection."
Read the safety instructions in "Safety
First—For You and Your Computer."
You need the following items to perform the procedures in this section:
- Dell OpenManage Server Assistant CD
Formatted 3.5-inch diskette
Dell PowerEdge 2400 User's Guide
Key to the system keylock
#1 and #2 Phillips screwdriver
1/4-inch nut driver, preferably with magnetic insert tip
Wrist grounding strap as explained in "Protecting Against Electrostatic Discharge"
The procedures in this guide require that you remove the cover and work inside the
computer. While working inside the computer, do not attempt to service the computer except
as explained in this guide and elsewhere in Dell documentation. Always follow the
instructions closely.
Working inside the computer is safe—if you observe the following precautions.
 |
WARNING FOR YOUR PERSONAL SAFETY
AND PROTECTION OF THE EQUIPMENT Before
starting to work on the computer, perform the following steps in the sequence listed:
- Turn off your computer and any peripherals (unless you are
installing or removing a hard-disk drive).
- Disconnect the computer and any attached peripherals. Also, disconnect any telephone or telecommunication lines from the computer.
- Wear a wrist grounding strap, and clip it to any unpainted metal surface on the
computer chassis, such as the metal around the card-slot openings at the back of the
computer, before touching anything inside your computer.
If a wrist grounding strap is not available, periodically touch any
unpainted metal surface on the computer chassis to discharge any static charge from your
body.
|
Precautions for Rack-Mountable Products
Observe the following precautions for rack stability and safety.
Also refer to the rack installation documentation accompanying the system and the rack for
specific warning and/or caution statements and procedures.
 |
WARNING: Installing Dell system components in a Dell rack
without the front and side stabilizers installed could cause the rack to tip over,
potentially resulting in bodily injury under certain circumstances. Therefore, always
install the stabilizers before installing components in the rack. |
|
After installing system components in a rack, never pull
more than one component out of the rack on its slide assemblies at one time. The weight of
more than one extended component could cause the rack to tip over and injure someone. |
 |
NOTE: Dell’s server and storage systems are certified as
components for use in Dell’s rack cabinet using the Dell customer rack kit. The final
installation of Dell systems and rack kits in any other brand of rack cabinet has not been
approved by any safety agencies. It is the customer’s responsibility to have the
final combination of Dell systems and rack kits for use in other brands of rack cabinets
evaluated for suitability by a certified safety agency. |
- System rack kits are intended to be installed in a Dell rack by
trained service technicians. If you install the kit in any other rack, be sure that the
rack meets the specifications of a Dell rack.
- Do not move large racks by yourself. Due to the height and weight of
the rack, Dell recommends a minimum of two people to accomplish this task.
- Before working on the rack, make sure that the stabilizers are secure
to the rack, extend to the floor, and that the full weight of the rack rests on the floor.
Install front and side stabilizers on a single rack or front stabilizers for joined
multiple racks before working on the rack.
- Always load the rack from the bottom up, and load the heaviest item
in the rack first.
- Make sure that the rack is level and stable before extending a
component from the rack.
- Extend only one component at a time from the rack.
- Use caution when pressing the component rail release latches and
sliding a component into or out of a rack; the slide rails can pinch your fingers.
- After a component is inserted into the rack, carefully extend the
rail into a locking position, and then slide the component into the rack.
- Do not overload the AC supply branch circuit that provides power to
the rack. The total rack load should not exceed 80 percent of the branch circuit rating.
- Ensure that proper airflow is provided to components in the rack.
- Do not step on or stand on any system or component when servicing
other systems or components in a rack.
Static electricity can harm delicate components inside your computer. To prevent static
damage, discharge static electricity from your body before you touch any of your
computer’s electronic components, such as the microprocessor. You can do so by
wearing a wrist strap when working inside the computer, or, if a wrist strap is not
available, by touching an unpainted metal surface on the computer chassis to discharge any
static charge from your body.
As you continue to work inside the computer, periodically touch an unpainted metal
surface to remove any static charge your body may have accumulated.
You can also take the following steps to prevent damage from electrostatic discharge
(ESD):
- Wear a wrist grounding strap, and clip it to any unpainted metal surface on the computer
chassis.
When unpacking a static-sensitive component from its shipping carton, do not remove the
component from the antistatic packing material until you are ready to install the
component in your computer. Just before unwrapping the antistatic packaging, be sure to
discharge static electricity from your body.
When transporting a sensitive component, first place it in an antistatic container or
packaging.
Handle all sensitive components in a static-safe area. If possible, use antistatic floor
pads and workbench pads.
The following notice may appear throughout this document to remind you of these
precautions:
In addition, Dell recommends that you periodically review the safety instructions for
this system as defined in the Installation and Troubleshooting
Guide.
When following the procedures in this document, assume that the
locations or directions relative to the computer are as shown in Figure 1.
Figure 1. Computer Orientation
 |
| 1 |
Left side of system |
| 2 |
Back of system |
| 3 |
Right side of system |
| 4 |
Front of system |
|
|
The computer is enclosed by a front bezel, a top cover, and a left-
and right-side cover. To access the inside of the computer for service, you need to remove
the front bezel and one or both of the side covers. To access the hard-disk drives, you
must remove the front bezel. Removal of the right-side computer cover allows access to the
system board, SCSI backplane board, and external SCSI devices. Removal of the left-side
computer cover permits access to the diskette drive interface cable. Removal of the top
cover permits access to the optional power supply distribution board, if two optional
hot-pluggable power supplies are installed.
To remove the front bezel of the computer, perform the following
steps:
 |
CAUTION: See "Safety First—For You and Your Computer
before working inside your computer."
|
- Turn the keylock on the front bezel of the computer to the unlocked
position.
- Grasp the bezel by the indentations on each side of the external
drive bays and pull it slightly away from the chassis to release the two detents on the
back of the bezel.
- Pivot the bezel downward (see Figure 2) until it is at a right angle
to the computer chassis.
Figure 2. Front Bezel Removal
- Grasp the bezel along the edge adjacent to the computer chassis and
unsnap the bezel to remove it from the chassis.
To replace the front bezel, perform the following steps:
- Make sure the keylock is in the unlocked position.
- Snap the two tabs near the lower inside edge of the front bezel into
the corresponding metal clips on the chassis, and pivot the bezel upwards into its closed
position.
- Set the keylock to the locked position.
Figure 3. Computer Cover Removal
 |
| 1 |
Screw (2) |
| 2 |
Thumbscrew (3 per side
cover) |
| 3 |
Side Cover (2) |
| 4 |
Top cover |
|
|
To remove the computer side covers, perform the following steps:
|
CAUTION: See "Safety First—For You and Your Computer
before working inside your computer."
|
- Remove the front bezel.
- Loosen the three thumbscrews along the front edge of either side cover (see Figure 3).
- Slide one cover forward about 12 millimeters (a half-inch) and grasp the top of the
cover at both ends. Rotate the top edge of the cover away from the chassis, and lift it
away from the chassis.
- Repeat steps 2 and 3 to remove the remaining side cover, if necessary.
To replace a computer side cover, perform the following steps.
NOTICE: Make sure that there are no cables or cable
connectors lying on the top diskette drive in the upper drive cage. Foreign objects on top
of the drive can interfere with drive operation and permanently damage the drive.
Check all cable connections, especially those that might have
come loose during your work. Fold cables out of the way so that they do not catch on the
computer cover.
- Check that no tools or parts (including screws) are left inside the
computer.
- Fit the cover over the side rail at the bottom of the chassis, and
slide it closed.
- Secure the cover with the three thumbscrews (see Figure
3).
To remove the top cover, perform the following steps:
- Remove both side covers.
- Remove the two screws at the front edge of the top cover (see Figure 3).
- Slide the top cover forward about 12 millimeters (a half inch) and
lift the top cover off the chassis.
To replace the top cover, perform this procedure in reverse order.
In Figure 4, the cover on the right side of the computer is removed
to provide an interior view. Figure 4 also identifies the drive bays. Refer to these
illustrations to locate interior features and components discussed later in this guide.
Figure 4. Inside the System (Right-Side View)
 |
| 1 |
System board |
| 2 |
SCSI backplane board |
| 3 |
Interface cable |
| 4 |
DC power cable |
| 5 |
Hard-disk drive bays (4
or 6) |
| 6 |
External drive bays (4) |
|
|
|
|
|
|
|
|
The system board holds the computer's control circuitry,
microprocessors, and other electronic components. Some hardware options are installed
directly on the system board. The external drive bays provide space for up to three
half-height 5.25-inch drives, typically CD-ROM drives or other removable-media drives. The
diskette drive bay holds a 3.5-inch diskette drive. The hard-disk drive bays provide space
for up to four 1.6-inch or six 1-inch SCSI hard-disk drives. These hard-disk drives are
connected to a SCSI host adapter on the system board or on an expansion card, via the SCSI
backplane board.
When you look inside the computer, note the power cables leading
from the power supply(s). The power cables supply power to the system board, SCSI
backplane board, externally accessible drives, and any expansion cards that connect to
external peripherals.
For non-SCSI drives such as the diskette drive, an interface cable
connects each drive to an interface connector on the system board or on an expansion card.
For SCSI devices, interface cables connect externally accessible SCSI devices and the SCSI
backplane board to a SCSI host adapter either on the system board or on an expansion card.
During a service procedure, you may be required to change a jumper
or switch setting. For information on the system board jumpers, see "Jumpers, Switches, and Connectors."
Figure 5. Plastic Insert Removal
 |
| 1 |
Front bezel |
| 2 |
Tabs (2) |
| 3 |
Plastic insert |
|
|
To remove a plastic insert, perform the following steps:
- Remove the front bezel.
- From the back of the front bezel, press against the center
of the insert with your thumbs until the insert bows sufficiently to loosen the tabs on
the sides of the insert (see Figure 5).
- Pull the insert out of the bezel.
To replace a plastic insert, position the insert over the
bay opening from the inside of the bezel and carefully press the insert into place.
If you need to remove a metal upper drive bay insert from
the chassis, press the tab on the right side of the insert and pivot the insert away from
the chassis.
Figure 6.
Control Panel Assembly Removal
 |
| 1 |
Screw |
| 2 |
Control Panel |
| 3 |
Control panel cable |
|
|
To remove the control panel assembly, perform the following
steps.
- Remove the front bezel.
- Remove the computer covers.
- Disconnect the control panel cable from the PANEL connector
on the system board (see "System Board Features").
The PANEL connector is near the top of the system board toward the front of the computer
chassis.
- Remove the screw holding the control panel assembly to the
front of the computer chassis (see Figure 6).
- Lift the control panel assembly out of the chassis hooks.
- Remove the control-panel assembly cable from the hole in the
chassis.
To replace the control panel assembly, slide the slots in
the assembly over the upper chassis hooks (see Figure
6), then slide the assembly down until its bottom edge engages the lower chassis hook.
Secure the assembly with the screw, and reconnect the control panel cable to the system
board PANEL connector.
Figure 7. Chassis
Intrusion Switch Removal
 |
| 1 |
Screw |
| 2 |
Chassis intrusion switch |
| 3 |
Cable to system board |
|
|
To remove the chassis intrusion switch, perform the
following steps.
- Remove the front bezel.
- Remove the computer covers.
- Disconnect the chassis intrusion switch cable from the
INTRUS2 connector on the system board (see system board
features).
The INTRUS2 connector is located at the left (front) edge of
the system board.
- Remove the screw holding the intrusion switch and its
bracket to the computer chassis (see Figure 7).
- Lift the chassis intrusion switch and cable out of the
chassis.
Figure 8 shows an example of drive hardware that can be
installed in the computer. Refer to this figure when you perform any of the procedures in
the following subsections.
Figure 8. Drive Hardware
 |
| 1 |
SCSI hard-disk drive (4 or 6 slots) |
| 2 |
Power input connector (POWER) |
| 3 |
SCSI backplane board |
| 4 |
SCSI CD-ROM drive |
| 5 |
Diskette-drive |
| 6 |
Diskette-drive interface cable |
| 7 |
SCSI connector (SCSI2 ULTRA NARROW) |
| 8 |
System board |
| 9 |
SCSI connector (SCSI1 Ultra2/LVD) |
| 10 |
Ultra2/LVD SCSI cable |
| 11 |
SCSI backplane interface cable |
| 12 |
SCSI connector (BACKPLANE) |
|
|
Externally Accessible Drives
The chassis provides three bays for 5.25-inch externally accessible
drives and a bay dedicated to a 3.5-inch diskette drive.
Figure 9.
Externally-Accessible 5.25-Inch Drive Removal
 |
| 1 |
CD-ROM drive |
| 2 |
Drive release tab |
| 3 |
Lower bay for optional drives (2 slots) |
|
|
|
|
To remove a 5.25-inch drive assembly from one of the
externally accessible drive bays, perform the following steps.
- Disconnect the DC power cable and the interface cable from the back
of the drive.
Be sure to record the power connector number and the location of the interface cable
connector.
- Press inward (toward the center of the drive) on the two
drive-release tabs, and slide the drive out of the bay (see Figure 9).
- Remove the drive-mounting rails from the drive (see Figure 10).
Figure 10. Drive Mounting Rail Removal
 |
| 1 |
Screws (4) |
| 2 |
Drive mounting rails (2) |
| 3 |
Drive release tabs (2) |
|
|
|
|
- If the drive is a SCSI drive, record the
setting of the SCSI address jumpers and SCSI bus termination jumper.
- If present, remove the 50-pin to 68-pin adapter from the SCSI
connector on the back of the drive.
Some drives use a 50-pin to 68-pin adapter between the SCSI cable and the drive connector.
Check the back of the drive for an adapter, if present; remove it and retain it for use on
the new drive.
| |
NOTE: When you reinstall a SCSI drive, set the SCSI address jumpers and
the SCSI bus termination jumpers to the settings you recorded.
|
Figure 11.
3.5-inch Diskette Drive Removal
 |
| 1 |
Retaining screw |
| 2 |
3.5-inch diskette drive |
| 3 |
Bracket mounting screws (4) |
| 4 |
Drive bracket |
| 5 |
Tabs (2) |
|
|
To remove the 3.5-inch diskette drive, perform the
following steps:
- Remove the left side cover.
- Disconnect the DC power cable and the interface cable from
the back of the diskette drive.
- Remove the retaining screw from the front of the chassis at
the left side of the drive (see Figure 11).
- Slide the drive assembly out of the bay.
- Rotate the assembly to the right so the tabs at the back of
the bracket clear the drive bay opening.
- Remove the four bracket mounting screws securing the bracket
to the drive (see Figure 11), and remove the drive.
When installing the 3.5-inch drive assembly, make sure that
the tabs at the back of the bracket engage the slots at the back of the bay. The back of
the bay is visible through the open left side of the computer.
Hard-Disk Drives
Each hard-disk drive is mounted in a hard-disk drive
carrier. The front bezel must be removed to remove a drive carrier. Hot-pluggable drives
may be individually powered down and replaced.
To remove a hard-disk drive and its carrier, perform the
following steps.
- Remove the front bezel.
- Wait until the drive status indicators adjacent to the
drive bay signal that the drive may be removed safely.
- The drive status indicators will flash sequentially as the
drive is powered down. When all the drive's status indicators are turned off, the drive is
ready for removal.
- Open the drive carrier handle to release the carrier (see
Figure 12).
- Slide the carrier toward you until it is free of the drive
bay.
- Remove the four screws that secure the hard-disk drive to
the carrier and remove the drive from the carrier.
Figure 12. Hard-Disk Drive and Carrier Removal
 |
| 1 |
Screws (4) |
| 2 |
Hard-disk drive |
| 3 |
Carrier |
|
|
|
|
|
|
To install a replacement hard-disk drive, perform the
following steps:
- Insert the replacement hard-disk drive into the carrier and
install four screws to secure the drive.
- Install the replacement hard-disk drive and carrier into its
slot. Raise the handle until it engages the front panel, then close the latch to ensure
that the drive is fully seated in the SCSI backplane board.
Figure 13. SCSI
Backplane Removal
 |
| 1 |
Tabs on chassis |
| 2 |
Tabs on hard-disk drive cage |
| 3 |
SCSI backplane board |
| 4 |
Thumbscrew |
|
|
|
|
To remove a SCSI backplane board, perform the following
steps.
- Unlatch and pull the hard-disk drives 12 millimeters (1/2
inch) away from their SCSI backplane connector.
- Record the connector used and disconnect all cables attached
to the SCSI backplane board (see Figure 14).
DC power connector (POWER) is connected to the power input connector on the backplane
board. The interface cable connectors vary with the type of SCSI backplane board
installed.
Figure 14. SCSI
Backplane Connectors
 |
| 1 |
Power connector (POWER) |
| 2 |
Ultra2/LVD SCSI cable connector
(SCSIA) |
| 3 |
System board data cable connector (PLANAR) |
|
|
- Loosen the thumbscrew on the SCSI backplane board (see Figure 13).
- Slide the SCSI backplane board out and away from the system
board about 6.3 millimeters (a quarter-inch) and lift it off the L-shaped mounting tabs on
the hard-disk drive cage.
When installing a replacement SCSI backplane board, ensure
that the replacement board is identical to the SCSI backplane you just removed.
The plastic cooling shroud inside the system is used to
improve airflow over the microprocessors. You will need to remove this shroud to access
certain components on the system board.
To remove the cooling shroud, perform the following steps.
- Turn off the system, including any attached peripherals, and
disconnect the power cable from the electrical outlet.
- Remove the right-side computer
cover.
- Unscrew and remove the two retention pins (see Figure 15).
Figure 15. Cooling Shroud Removal
 |
| 1 |
Retention pins |
| 2 |
Cooling shroud |
| 3 |
Cooling fan |
|
|
- Remove the shroud by lifting the end of the shroud closest
to the front of the system until the opposite end of the shroud disengages from the
cooling fan on the system back panel.
Cooling Shroud Replacement
To replace the cooling shroud, perform the following steps:
- Hook the upper edge of the large opening on the end of the
cooling shroud over the top of the cooling fan on the system back panel.
- Lower the other end of the shroud into place over the
microprocessor(s).
NOTICE: Hand tighten the retention pins securing
the cooling shroud. Do not use tools or over-tighten these retention pins.
- Secure the shroud by reinstalling the two retention pins.
Two cooling fans are installed in the Dell PowerEdge 2400 system
chassis: a fan on the chassis back panel and a front fan beneath the drive bays.
Back Panel Fan Removal
To remove and replace the cooling fan at the chassis back panel,
perform the following steps.
- Turn off the system, including any attached peripherals, and
disconnect the AC power cable from its power source.
- Remove the right-side computer cover.
- Remove the cooling shroud.
- Disconnect the cooling fan cable from the FAN3 (back fan) connector
on the system board (see System Board Features).
- Remove the four fasteners that
secure the fan to the back of the chassis:
- On the fan side, push the plunger of each fastener back into the
fastener barrel, using a coin, the flat surface of a flat-tipped screwdriver, or other
small flat object.
- On the opposite side of the back panel, grasp the extended head of
the fastener and pull the fastener completely out of the back panel, as shown in Figure
16.
Keep the four fasteners for securing the replacement fan.
Figure 16. Fan Removal
 |
| 1 |
Cooling fan |
| 2 |
Fasteners (4 - back fan, 2 -
front) |
| 3 |
Bulkhead/back panel |
|
|
- Remove the fan from the chassis.
Back Panel Fan Replacement
To install the replacement fan on the back of the chassis,
perform the following steps.
- Secure the fan to the back of the chassis using the four
fasteners you removed in step 5 of the Back Fan Removal
procedure.
- Connect the fan power cord to the system board FAN3
connector.
- Replace the right-side computer
cover and reconnect the system to AC power.
- Connect the system and any attached peripherals to an AC power source
and turn on the system.
To remove the cooling fan beneath the drive bays at the chassis
front, perform the following steps.
- Turn off the system, including any attached peripherals, and
disconnect the AC power cable from its power source.
- Remove the front bezel.
- Remove the right-side computer cover.
- Unlatch and pull each hard-disk drive 25-mm (1-inch) out of its slot.
- Remove the SCSI backplane board.
- If a full-length expansion card is installed in slot #1, remove that
expansion card.
This ensures adequate clearance to remove the fan fastener from the bulkhead.
- Disconnect the front cooling fan cable from the FAN1 (front fan)
connector on the system board (see System Board Features).
- Remove the two fasteners that secure
the fan to the chassis back panel:
- At the fan side, push the plunger of each fastener back into the
fastener barrel, using a coin, the flat surface of a flat-tipped screwdriver, or other
small flat object.
- On the opposite side of the bulkhead, grasp the extended head of the
fastener and pull the fastener completely out of the back panel.
Keep the two fasteners for securing the replacement fan.
- Remove the fan from the chassis.
Front Fan Replacement
To install the replacement fan to the inner bulkhead
beneath the drive bays at the chassis front, perform the following steps.
- Slide the left side of the fan under the two chassis tabs on
the left side and position the fan to rest on a third tab extending from the bulkhead.
- Secure the fan to the bulkhead using the two fasteners you
removed in step 8 of the Front Fan Removal procedure.
- Route the fan power cord through the hole in the inner chassis wall
near the system board FAN1 connector.
- Connect the fan power cord to the system board FAN1
connector.
- Install any expansion card you removed from slot #1.
- Install the SCSI backplane board.
- Install each hard-disk drive into its slot and close its
latch.
- Replace the right-side computer
cover and reconnect the system to AC power.
- Replace the front bezel.
- Connect the system and any attached peripherals to an AC power source
and turn on the system.
Dell PowerEdge 2400 systems may contain a single, standard, power supply, or it may
contain two optional, redundant, hot-pluggable power supplies.
Standard Power Supply
Figure 17. Standard Power Supply
Removal
 |
| 1 |
Power supply |
| 2 |
Mounting screws (2) |
|
|
|
|
|
|
To remove a standard power supply, perform the following steps.
|
|
| CAUTION: The power
supply is heavy. Support it with both hands when installing or removing it. |
|
- Turn off the system, including any attached peripherals, and
disconnect the AC power cable from its power source.
- Remove the front bezel.
- Remove both computer side covers.
- Remove the top cover.
- Disconnect the power cable harness from the POWER connector on the SCSI backplane board, the POWER1
connector on the system board, and the diskette drive and
other drives in the external drive bays.
When you disconnect a cable connector from the SCSI backplane board and the system board,
press the plastic latch on one side of the connector to release it.
- Remove the two screws on either side of the power supply (see Figure 17).
- Using both hands, slowly remove the power supply and its cable
harness from its slot.
When installing the replacement power supply, insert the cable
harness into the slot and route the separate connectors to their respective locations as
you are inserting the power supply.
Figure 18. Hot-Pluggable
Power Supply Removal
 |
| 1 |
Power supply distribution
board (PSDB) |
| 2 |
Power supply |
| 3 |
Latch on handle |
|
|
|
|
To remove a hot-pluggable power supply with the system operating,
perform the following steps.
|
CAUTION: The power supply is
heavy. Support it with both hands to avoid possible injury to yourself or to others when
installing or removing it.
|
|
CAUTION: Avoid touching the
card-edge connector on the back of the power supply. Wait 10 to 20 seconds after
disconnecting the power supply from its slot connector before removing the power supply or
coming into contact with its back card-edge connector.
|
- Verify that the red failure indicator is lit on the faulty power
supply.
- Disconnect the AC power cable from the AC power receptacle on the
back of the power supply you intend to remove.
- Remove the power supply:
- Using your thumb and index finger, squeeze the catch in the middle of
the power supply handle (see Figure 18).
- Rotate the handle downward to release the power supply from the
system chassis.
- Pull the power supply 25 mm (1 inch) away from its back connector and
wait 10 to 20 seconds to allow energized components to dissipate.
- Pull the power supply out of the chassis.
To install a Replacement Hot-Pluggable Power Supply,
perform the following steps.
NOTICE: Do not use excessive force when sliding the power
supply into the chassis.
|
CAUTION: The power supply is
heavy. Support it with both hands to avoid possible injury to
yourself or to others when installing or removing it.
|
- Slide the power supply into the chassis.
- Rotate the power supply handle to the closed position (see Figure 18).
For better leverage, press against the upper corners of the handle.
| |
NOTE: The power supply will not
function until the handle is closed. |
- Repeat steps 1 and 2 to install the second power supply, if necessary.
Replace top and side covers.
Replace the front bezel.
Connect the AC power cable to the power supplies and to the electrical outlet.
Make sure that the AC power cable passes through the plastic strain-relief clip on the
system back panel.
Connect the system and any attached peripherals to an AC power source
and turn on the system.
Observe the back panel of the power supply to verify that the green
power indicator LED is lit and that the red failure LED is off.
Figure 19. Power Supply Distribution Board Removal
 |
| 1 |
Power connector P2 |
| 2 |
Thumbscrew |
| 3 |
Power connector P3 |
| 4 |
Power connector P1 |
|
|
To remove the power supply distribution board (PSDB), perform the
following steps.
|
|
| NOTE: The PSDB is present only in systems with
hot-pluggable power supplies. |
- Turn off the system, including any attached peripherals, and
disconnect the AC power cable from its power source.
- Remove the front bezel.
- Remove both computer side covers.
- Remove the top cover.
- Disconnect the AC power cable from the AC power receptacle on the
back of the power supply.
|
CAUTION: The power
supply is heavy. Support it with both hands to avoid possible injury to yourself or to
others when installing or removing it.
|
- Remove both hot-pluggable power
supplies.
- At the PSDB (see Figure 18), record the
mating connector location and disconnect the 12-conductor power cable harness attached to
the P3 connector.
- Record the mating connector location and disconnect the
24-conductor power cable harness attached to the P1 connector on the PSDB.
- Record the mating connector location and disconnect the
18-conductor power cable harness attached to the P2 connector on the PSDB.
- Loosen the thumbscrew on the PSDB and remove the PSDB from the
chassis.
When installing the replacement PSDB, fold the cable harnesses out of the way as you
are inserting the PSDB.
Figure 20. System Board Removal
 |
| 1 |
System board bracket |
| 2 |
Screws (3) |
|
|
|
|
|
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To remove the system board, perform the following steps.
- Turn off the system, including any attached peripherals, and
disconnect the system from its electrical outlet.
- Remove the right-side computer cover.
- Remove all external peripheral cables from their connectors at the
back of the computer.
- Remove the cooling shroud.
- Record the locations and remove all internal cables attached to the
system board.
- Record the slot number and remove any expansion card internal cables,
and then remove all expansion cards.
- Remove the three screws securing the system board bracket to the
chassis (see Figure 20).
- Slide the system board and bracket assembly toward the front of the
chassis until it stops.
- Allow the system board and bracket assembly to tilt outward slightly
(see Figure 20).
- Lift the system board and bracket up and out of the chassis and lay
the bracket, system board side up, on a flat surface.
- Unscrew the thumbscrew securing the system board to the bracket.
- Slide the system board toward the front of the bracket about 6.3 mm
(1/4 inch).
- Carefully lift the system board off the bracket. Be sure to lift
evenly and not twist the system board.
- Remove the microprocessor(s) and terminator card.
- Remove the DIMMs.
- Remove the integrated RAID hardware key connector (if installed).
- Remove the integrated RAID SDRAM DIMM (if installed).
Keep this DIMM separate from the system memory DIMMs.
NOTICE: Only use unbuffered 64-MB SDRAM DIMM in the DIMM_RAID socket
When installing the replacement system board, install the system board on the bracket,
then install the following components which you removed from the old system board: DIMMs,
microprocessor(s), terminator card or secondary microprocessor, expansion cards, RAID
hardware key and RAID DIMM (if the integrated RAID system is used). Set the system board
jumpers to the same settings on the board you removed. Next, install the cooling shroud,
connect all internal cables to the system board, and then replace the computer covers.
Reconnect the I/O cables and power cables to the back panel, and turn the system power on.
Figure 21 defines the system board features. Use this figure when replacing your system
board or components that attach to the system board.
Figure 21. System Board Features
1 |
Power input connector (POWER1) |
2 |
Power input connector (POWER2) |
3 |
Primary microprocessor (PROC_1) |
4 |
Secondary microprocessor (PROC_2) |
5 |
DIMM sockets (DIMM_A [right]–DIMM_D) |
6 |
Chassis intrusion switch connector (unused)
(INTRUS1) |
7 |
Parallel port connector (PARALLEL) |
8 |
Serial port connectors (2) (SERIAL1 and SERIAL2) |
9 |
Keyboard and mouse connectors (KYBD/MOUSE) |
| 10 |
Integrated RAID hardware key connector (RAID_KEY) |
11 |
Universal Serial Bus (USB) connectors (2) |
12 |
Network interface connector (ENET) |
13 |
Video connector (VGA) |
14 |
Fan connector (FAN3) |
15 |
Battery connector (BATTERY) |
16 |
PCI connectors (PCI1 [top] through PCI6) |
17 |
ISA connector (ISA5) |
18 |
Dell Remote Assistant Card connector (SVR_MGT) |
19 |
Configuration jumpers |
20 |
DIMM socket for optional RAID controller
(DIMM_RAID) |
21 |
Fan connectors (FAN1, FAN2) |
22 |
SCSI backplane board interface cable connector
(BACKPLANE) |
23 |
Ultra2/LVD SCSI connector (SCSI1 ULTRA2/LVD) |
24 |
Chassis intrusion switch connector (INTRUS2) |
25 |
Diskette-drive interface connector (FLOPPY) |
26 |
Ultra/Narrow SCSI connector (SCSI2 ULTRA NARROW) |
27 |
Control panel interface cable connector (PANEL) |
The system board contains five 64-bit 33-megahertz (MHz) PCI expansion-card connectors
(PCI1 through PCI5), one 32-bit 33-MHz PCI expansion card connector (PCI6), and one
ISA expansion-card connector (ISA5) (see Figure 22). Because the ISA expansion-card
connector shares an expansion slot with expansion-card connector PCI5, you can install a
maximum of six expansion cards.
Figure 22. Expansion-Card Connectors
 |
| 1 |
PCI expansion-card connector PCI1 |
| 2 |
PCI expansion-card connector PCI2 |
| 3 |
PCI expansion-card connector PCI3 |
| 4 |
PCI expansion-card connector PCI4 |
| 5 |
ISA expansion-card connector ISA5 |
| 6 |
PCI expansion-card connector PCI5 |
| 7 |
PCI expansion-card connector PCI6 |
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Choosing an Expansion Slot
Follow these guidelines when you add an expansion card:
- Install 64-bit PCI expansion cards in connectors PCI1 through PCI5.
- Install a Dell Remote Assistant Card (DRAC), version 2.0, in
connector PCI6.
- Install an ISA expansion card in connector ISA5.
- Install full-length expansion cards in PCI slots PCI3 through PCI6
and ISA slot ISA5.
To install an expansion card, perform the following steps.
NOTICE: You must use the Resource Configuration
Utility (RCU) when you add or remove an ISA expansion card. Failure to do so may cause
resource conflicts between PCI devices (such as PCI expansion cards, the built-in video
controller, or the built-in SCSI host adapter). See "Using the Resource Configuration
Utility" in the User's Guide for instructions.
- If you are installing an ISA expansion card, start the Resource
Configuration Utility, and add the new expansion card to the configuration information.
- Remove the right-side computer cover.
- Prepare the expansion card for installation.
See the documentation that came with the expansion card for information on configuring the
card, making internal connections, or otherwise customizing the card for the system.
- Select the expansion slot that you will install the new expansion
card in.
- To release the expansion card bracket, press and hold the clip on the
back of the system while you press the release tab on the latch inside the system (see Figure 23), and then rotate the latch away from the expansion-card
bracket.
Figure 23. Expansion Card Installation
 |
| 1 |
Plastic card guide |
| 2 |
Expansion-card latch |
| 3 |
Release tab on expansion-card latch |
|
|
- To install the card, insert the card-edge connector firmly into the
expansion-card connector on the chassis.
- When the card is firmly seated in the connector and the card-mounting
bracket is aligned with the brackets on either side of it, close the expansion-card latch.
- If the expansion card is a full-length card, secure the inner end of
the card by closing the plastic latch on the card guide over the top edge of the card (see Figure 23).
- Connect any cables that should be attached to the card.
See the documentation that came with the card for information about cable connections.
- Replace the right-side computer
cover, and then reconnect the computer and peripherals to their AC power sources and
turn them on.
- If you installed an ISA expansion card, run the Resource
Configuration Utility and add the new expansion card to the configuration.
See "Using the Resource Configuration Utility" in the User's Guide for
instructions.
To remove an expansion card, perform the following steps.
- Remove the right-side computer cover.
Disconnect any cables connected to the card.
To release the expansion card bracket, press and hold the clip on the back of the system
while you press the release tab on the latch inside the system (see
Figure 23), and then rotate the latch away from the expansion-card bracket.
If the expansion card is a full-length card, release the card's inner end (towards the
front of the system) by opening the tab on the plastic card guide (see Figure 23).
Grasp the expansion card by its top corners, and carefully
remove it from the expansion-card connector.
If you are removing the card permanently, install a metal
filler bracket over the empty card-slot opening.
|
NOTE: Installing a filler
bracket over an empty expansion slot is necessary to maintain Federal Communications
Commission (FCC) certification of the system. The brackets also keep dust and dirt out of
the computer and aid in proper cooling and airflow inside the computer. |
- Replace the right-side computer cover, and then
reconnect the computer and peripherals to their AC power sources and turn them on.
- If you are relocating or removing an ISA expansion card, run the Resource Configuration
Utility, and delete the expansion card from the configuration information.
See "Using the Resource Configuration Utility," in the User's Guide for
instructions.
The four dual in-line memory module (DIMM) sockets on the system board can accommodate
64 megabytes (MB) to 2 gigabyte (GB) of registered SDRAM. The DIMM sockets are located
near the back edge of the system board (see Figure 21).
NOTICE: Only use unbuffered 64-MB SDRAM DIMM in the DIMM_RAID socket.
A single optional DIMM socket (DIMM_RAID) for the integrated RAID controller is shown
in Figure 21. This DIMM is removed and replaced
using the following procedures for conventional memory DIMMs; however, only unbuffered
64-MB SDRAM DIMM that are specifically for use with the integrated RAID controller can be
used.
Memory Upgrade Kits
The system is upgradable to 2 GB by installing combinations of 64-, 128- 256-, and
512-MB registered DIMMs. You can purchase memory upgrade kits from Dell as needed.
|
NOTE: The DIMMs must be rated
to run at 133 MHz or faster. |
DIMM Installation Guidelines
Starting with the socket nearest to the system board's back edge, the DIMM sockets are
labeled "DIMM_A" through "DIMM_D" (see Figure 24).
When you install DIMMs, follow these guidelines:
- Install a DIMM in socket DIMM_A before socket DIMM_B, socket DIMM_B before socket
DIMM_C, and so on.
- If you install different sizes of DIMMs, install them in order of descending capacity,
beginning with the highest-capacity DIMM in socket DIMM_A.
- You do not need to install DIMMs in pairs.
Figure 24.
DIMM Socket Locations
Table 1 illustrates several sample memory configurations based on these guidelines.
| |
DIMM Sockets |
Total Desired
Memory |
DIMM_A |
DIMM_B |
DIMM_C |
DIMM_D |
| 64 MB |
64 MB |
None |
None |
None |
| 128 MB |
64 MB |
64 MB |
None |
None |
| 128 MB |
128 MB |
None |
None |
None |
| 192 MB |
128 MB |
64 MB |
None |
None |
| 512 MB |
256 MB |
256 MB |
None |
None |
| 1 GB |
256 MB |
256 MB |
256 MB |
256 MB |
| 2 GB |
512 MB |
512 MB |
512 MB |
512 MB |
To perform a memory upgrade to the system board, perform the following steps.
- Turn off the system, including any attached peripherals, and disconnect the AC power
cable from its power source.
- Remove the front bezel.
- Remove the right-side computer cover.
- Remove the cooling shroud.
Locate the DIMM sockets in which you will install or replace DIMMs.
Figure 21 shows the relative location of the DIMM
sockets on the system board. Figure 24 shows the labeling of the
DIMMs sockets.
Install or replace the
DIMMs as necessary to reach the desired memory total.
Replace the cooling shroud, the
computer cover, the front
bezel,reconnect the system to the electrical outlet, and turn on the system.
After the system completes the power-on self-test (POST) routine, it runs a memory test
that displays the new memory total, which includes all newly installed memory.
|
NOTE: If the memory total is
incorrect, turn off and disconnect the computer and peripherals from their AC power
sources, remove the right-side computer cover, and check all the installed DIMMs to make
sure they are seated properly in their sockets. Ensure that the installed DIMMs conform to
one of the configurations listed in Table 1.
|
The system detects that the new memory does not match the system configuration
information, which is stored in nonvolatile RAM (NVRAM). The monitor displays an error
message that ends with the following words:
Press <F1> to continue; <F2> to enter System Setup
- Press <F2> to enter the System Setup program, and check the System Memory
setting in the system data box on the System Setup screens. The system should have already
changed the value in the System Memory setting to reflect the newly
installed memory.
- If the System Memory value is incorrect, one or more of the DIMMs may
not be installed properly. Repeat steps 1 through 9.
Carefully examine each DIMM to ensure proper seating in its socket.
- Run the Resource Configuration Utility. Then save the configuration and exit the
utility.
Running the Resource Configuration Utility and saving the configuration is required for
the system to recognize the newly installed DIMM(s). See "Using the Resource
Configuration Utility" in the User's Guide for instructions on running the
utility and saving the configuration.
- Run the system memory test in the Dell Diagnostics (see your Installation
and Troubleshooting Guide for complete information).
To install a DIMM, perform the following steps.
- Turn off the system, including any attached peripherals, and disconnect the AC power
cable from its power source.
- Remove the front bezel.
- Remove the right-side computer cover.
- Disconnect the AC power cable and all peripheral cables from the back panel of the
system.
- Remove the cooling shroud.
- Locate the DIMM sockets in which you will install or replace DIMMs.
Figure 21 shows the relative location of the DIMM
sockets on the system board. Figure 24 shows the labeling of the
DIMMs sockets.
- Press down and outward on the ejectors on the DIMM socket, as shown in Figure 25,
to allow the DIMM to be inserted into the socket.
Figure 25. DIMM Installation
 |
| 1 |
DIMM socket ejectors (2) |
| 2 |
Alignment keys (2) |
|
|
|
|
- Align the DIMM's edge connector with the slot in the center of the DIMM socket, and
insert the DIMM in the socket (see step A in Figure 25).
The DIMM socket has two alignment keys that allow the DIMM to be installed in the socket
in only one way.
- Press down on the DIMM with your thumbs while pulling up on the ejectors with your index
fingers to lock the DIMM into the socket (see step B in Figure 25).
When the DIMM is properly seated in the socket, the ejectors on the DIMM socket should
align with the ejectors on the other sockets with DIMMs installed.
- Repeat steps 7 through 9 to install the remaining DIMMs.
To remove a DIMM, press down and outward on the ejectors on each end of the socket
until the DIMM pops out of the socket (see Figure 26).
|
NOTES: This procedure assumes
the power is off and you have access to the DIMM slots. See steps 1 through 6 of the DIMM
Installation procedure for these preliminary steps.
If you encounter difficulty in moving the ejector nearest to the chassis wall, press down
on the opposite ejector and lift that end of the DIMM slightly to free the DIMM from its
socket. |
Figure 26. DIMM Removal
 |
| 1 |
DIMM socket ejectors (2) |
|
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The microprocessor is contained within a single-edge contact (SEC) cartridge and heat
sink assembly. The system board has two guide bracket assemblies, which hold the SEC
cartridge and heat sink assemblies. If your system has only one microprocessor, the
secondary guide bracket assembly connector must contain a terminator card. If your system
has two microprocessors, the secondary microprocessor must have the same operating
frequency as the first. For example, if the system has a 600-MHz primary microprocessor,
your secondary microprocessor must also be a 600-MHz microprocessor.
NOTICE: If you are upgrading a system by installing a
secondary microprocessor, you must order an upgrade kit from Dell. The upgrade kit from
Dell contains the correct version of the microprocessor for use as a secondary
microprocessor.
To remove a terminator card, perform the following steps.
- Turn off the system, including any attached peripherals, and disconnect the AC power
cable from its power source.
- Remove the front bezel.
- Remove the right-side computer cover.
- Disconnect the AC power cable and all peripheral cables from the back panel of the
system.
- Remove the cooling shroud.
- Lift the terminator card up and out of the guide bracket assembly (see Figure 27).
Figure 27. Terminator Card Removal
 |
| 1 |
Terminator card |
| 2 |
Tabs (2) |
| 3 |
Guide bracket assembly |
| 4 |
Socket |
|
|
Installing a Terminator Card
To install a terminator card, align the notch on the terminator card with the socket on
the guide bracket assembly and guide the card into the empty guide bracket assembly.
To remove the SEC cartridge and heat sink assembly, perform the following steps.
|
CAUTION: The SEC cartridge
and heat sink assembly can get extremely hot during system operation. Be sure the assembly
has had sufficient time to cool before you touch it. |
|
CAUTION: When handling the
SEC cartridge and heat sink assembly, take care to avoid sharp edges on the heat sink. |
- Turn off the system, including any attached peripherals, and disconnect the AC power
cable from its power source.
- Remove the front bezel.
- Remove the right-side computer cover.
- Disconnect the AC power cable and all peripheral cables from the back panel of the
system.
- Remove the cooling shroud.
- Deflect and lift one end of the guide bracket about 6.3 mm (0.25 inch) to disengage one
end of the microprocessor's connector from the socket.
- Deflect the tab on the other end of the guide bracket to disengage the tab on the heat
sink.
- Lift the cartridge and heat sink assembly away from the guide bracket assembly (see
Figure 28).
Figure 28. SEC Cartridge and
Heat Sink Removal
 |
| 1 |
Retention pin (removed
with cooling shroud) |
| 2 |
SEC cartridge |
| 3 |
Tab on heat sink (2) |
| 4 |
Tab on guide bracket (2) |
| 5 |
Guide bracket assembly |
| 6 |
Socket |
| 7 |
Threaded stud |
|
|
SEC Cartridge and Heat Sink Assembly Replacement
To install the replacement SEC cartridge and heat sink assembly, refer to Figure 28 and perform the following steps:
- Remove the
terminator card
or old SEC cartridge
from the guide bracket assembly.
Slide the SEC cartridge into the guide bracket assembly, and firmly seat the assembly
until the tabs on the guide bracket assembly snap into place over the ends of the heat
sink (see Figure 28).
- Replace the
cooling shroud
and computer cover.
The system battery maintains system configuration, date,
and time information in a special section of memory when you turn off the system. The
operating life of the battery ranges from 2 to 5 years, depending on how you use the
system (for example, if you keep the system on most of the time, the battery gets little
use and thus lasts longer). You may need to replace the battery if an incorrect time or
date is displayed during the boot routine along with the following or similar message:
Time-of-day not set -- please run SETUP program
Strike the F1 key to continue, F2 to run the setup utility
or
System CMOS checksum bad -- Run SETUP
Strike the F1 key to continue, F2 to run the setup utility
or
Invalid configuration information -- please run SETUP
program
Strike the F1 key to continue, F2 to run the setup utility
To determine if the battery needs replacing, reenter the
time and date through the System Setup program. Turn off the system for a few hours, and
then turn it on again. Enter the System Setup program. If the date and time are not
correct in the System Setup program, replace the battery.
|
NOTES: Some software may
cause the system time to speed up or slow down. If the system seems to operate normally
except for the time kept in the System Setup program, the problem may be caused by
software rather than by a defective battery. If
the system is turned off for long periods of time (for weeks or months), the NVRAM
may lose its system configuration information. This situation is not caused by a
defective battery. |
You can operate the system without a battery; however, the
system configuration information maintained by the battery in NVRAM is erased each time
you shut down the computer. Therefore, you must reenter the system configuration
information and reset the options each time the system initializes until you replace the battery.
The battery is a 3.0-volt (V), coin-cell CR2032-type
battery. To remove the battery, perform the following steps.
|
CAUTION: There is a danger of a new battery
exploding if it is incorrectly installed. Replace the battery only with the same or
equivalent type recommended by the manufacturer. Discard used batteries according to the
manufacturer’s instructions. |
- Enter the System Setup program and, if possible, make a
printed copy of the System Setup screens.
See "Using the System Setup Program" in the User's Guide for
instructions.
- Shut down the system, including any attached peripherals,
and disconnect the system from the electrical outlet.
- Remove the right-side computer
cover.
- Remove the cooling shroud.
- If necessary, remove the
expansion cards to gain access to the battery.
- Remove the battery.
Pry the battery out of its socket with your fingers or with a blunt, nonconductive object
such as a plastic screwdriver.
- Install the new battery with the side labeled "+"
facing up (see Figure 29).
Figure 29. Battery Replacement
- Reinstall the expansion cards
if you removed them in step 5.
- Replace the cooling shroud
and computer cover, and then reconnect the computer
and peripherals to their AC power sources and turn them on.
- Enter the System Setup program to confirm that the battery
is operating properly.
- Enter the correct time and date through the System Setup
program's Time and Date settings. Also reenter any system configuration
information that is no longer displayed on the System Setup screens, and then exit the
System Setup program.
- Turn off the computer and peripherals, and leave them off
for at least an hour.
After an hour, turn on the system and enter the System Setup
program. If the time and date are still incorrect, replace the system board.
Back to Contents Page
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