Removing and Replacing Parts: Dell Dimension 4100 System Reference
Removing and Replacing Parts: Dell™ Dimension™ 4100
System Reference
Unless otherwise noted, each of the following procedures assumes:
- You can replace or reinstall a part by performing the removal
procedure in reverse order.
Before you remove or replace parts in the computer, read the
following warning and caution for your personal safety and to prevent damage to the
computer from electrostatic discharge (ESD).
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CAUTION FOR YOUR PERSONAL SAFETY
AND PROTECTION OF THE EQUIPMENT. Before you
start to work on the computer, perform the following steps in the sequence listed:
- Turn off your computer and all devices.
- Ground yourself by touching an unpainted metal surface at the back of
the computer before touching anything inside your computer.
While you work, periodically touch an unpainted metal surface on the
computer to dissipate any static electricity that might harm internal components.
- Disconnect any devices connected to the computer, including the
monitor, from their electrical outlets to reduce the potential for personal injury or
shock. Also, disconnect any telephone or telecommunication lines from the computer.
- Disconnect the power cable to your computer, and then press the power button to ground the system
board.
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After you remove or replace parts in the computer, observe the
following notice to prevent damage to the computer.
NOTICE: Make sure that all other system cables are connected
before connecting the computer to its electrical outlet.
- Small flat-blade screwdriver
- Wide flat-blade screwdriver
- #1 and #2 Phillips-head screwdrivers
- Tweezers or long-nose pliers
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| 1 |
Cover-mounting thumbscrew |
| 2 |
Computer foot stand |
| 3 |
Cover release latches (2) |
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NOTICE: To avoid inadvertently damaging the system board
while performing the following procedure, be sure that you disconnect the computer’s
power cable from the electrical outlet and from the back of the computer, and then press
the power button before removing the computer
cover. The system board continues to receive a small amount of power when the computer is
turned off and attached to an electrical outlet (the system-board power light is on
when power is detected.)
To remove the computer cover from a desktop or mini tower computer:
- If you are working on a mini tower computer, lay the computer on its
right side with the computer foot stand off the edge of the work surface to allow the
computer to lay flat as shown in the preceding illustration.
- Loosen the cover-mounting thumbscrew that secures the cover to the
back of the computer.
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NOTE: The thumbscrew is captive and stays in the cover when
loosened. |
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CAUTION: To prevent cuts, keep
your hands clear of the metal edges on the computer and fan guard as you slide the cover
back. |
- Face the front of the computer. Use your thumbs to press in both
cover release latches while pushing the cover backward. Move the cover back about an inch,
and then lift it straight up off the computer.
If necessary, use both hands and work one side at a time.
To replace the computer cover on a desktop or mini tower computer:
- Position the cover on the computer approximately one inch
back. Slide the cover forward until it locks into place.
- Tighten the cover-mounting thumbscrew on the back of the computer.
To remove the front panel:
- With the cover removed, press in the
tabs along the top and side of the front panel.
- Swing the front panel away from the computer, disengage the hooks and
carefully pull the front panel away from the computer.
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| 1 |
Drive cage |
| 2 |
Screw |
| 3 |
Drive-cage slots (6) |
| 4 |
Tabs (6) |
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To remove the drive cage:
- Remove
the front panel.
- Note the location
and orientation of all cables attached to the drives in the drive cage; then disconnect
the cables.
Remove the screw
that secures the drive cage to the computer.
Slide the drive cage forward approximately 1/2 inch. Then lift it up
(to the side for the desktop computer) and away from the computer.
The side of the computer contains three detents that secure the drive cage to the side of
the computer. The drive cage may be slightly difficult to slide forward until it detaches
from these detents.
To remove a 3.5-inch insert:
- Remove the front panel.
- From the back of the front panel, as shown for the mini tower
computer, press the release tab to the side, rotate the insert toward you, and remove it
from the bezel.
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NOTE: For mini tower computers, you must remove the upper
insert to remove the lower insert. |
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| 1 |
Tabs (2) |
| 2 |
Front-panel insert |
| 3 |
Retaining hook |
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The insert for the lower 5.25-inch bay is mounted to the drive cage.
Press in the two tabs on the right side, and rotate the insert toward you until the
retaining hook disengages from the drive cage.
Reinstall the insert by fitting the hook into the slot on the left
side of the drive cage, rotating the insert into place, and snapping the tabs on the right
side of the insert into the slots in the drive cage.
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| 1 |
Drive-bracket mounting screw |
| 2 |
Drive assembly screws (3) |
| 3 |
Drive bracket |
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To remove the upper 3.5-inch
drive:
- Remove the front panel.
Remove the drive cage.
Remove the 6/32 x 1/4-inch screw securing the drive bracket to the
drive cage, and then remove the bracket as shown.
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NOTES: The three screws that secure the drive to the bracket
and the left side of the drive cage have 3-millimeter (mm) threads. Be sure to use the
correct 3 x 5-mm screws when you secure the replacement drive to the bracket and the drive
cage. Also note which 6/32 x 1/4-inch screw was used
to secure the drive bracket to the drive cage in step 3, and use the same screw when you
reinstall the bracket with its attached drive. |
When you replace a drive, set the jumpers on the replacement drive
to match the jumpers on the drive you removed. For additional information about jumper
settings on enhanced integrated drive electronics (EIDE) drives, see EIDE
Subsystem.
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NOTE: This drive bay is used only in mini tower computers. |
 |
| 1 |
Drive-mounting screws (3) |
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To remove the lower 3.5-inch drive:
- Remove the front panel.
Remove the drive cage.
Remove the three drive-mounting screws, one from the
bottom and two from the left side.
Slide the drive out of the drive cage.
When you replace a drive, set the jumpers on the replacement drive
to match the jumpers on the drive you removed. For additional information about jumper
settings on EIDE drives, see EIDE Subsystem.
To insert the bottom drive back into the bay, you must slide the
drive over the two small grooves on the bottom of the bay.
To remove the 3.5-inch floppy drive:
- Remove the front
panel.
Disconnect the power and interface
cables from the back of the floppy drive.
Press the two drive-release tabs, and slide the drive out of the
drive bay.
Before you install the new drive, transfer the drive-release tabs to
the replacement floppy drive.
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| 1 |
Drive-mounting screws (3) |
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To remove the 5.25-inch drive:
- Remove the front panel.
- Remove the drive cage.
- Remove the three drive-mounting screws and slide the drive out of the drive bay.
When you replace a drive, set the jumpers on the replacement drive
to match the jumpers on the drive you removed. For additional information about jumper
settings on EIDE drives, see EIDE Subsystem.
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| 1 |
Primary hard drive |
| 2 |
Card guide assembly |
| 3 |
Drive-assembly mounting screws (2) |
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To remove the primary hard drive:
- Remove the front panel.
- Remove the two drive-assembly mounting screws.
- Lift the primary hard drive out of the card guide assembly.
- Disconnect the DC power and interface cables from the back of the drive.
To reinstall the primary hard drive, place the drive's circuit board
toward the front of the computer.
When you replace a hard drive, set the jumpers on the replacement
drive to match the jumpers on the drive you removed. For additional information about
jumper settings on EIDE drives, see EIDE Subsystem.
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| 1 |
Secondary hard drive assembly |
| 2 |
Card guide assembly |
| 3 |
Drive-assembly mounting screws (2) |
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To remove the secondary hard drive:
- Remove the front panel.
- Disconnect the DC power and interface cables from the back of the drive.
- Remove the two drive-assembly mounting screws.
- Slide the hard drive assembly toward the back of the computer and lift it out.
- Remove the drive from the drive bracket by removing the screw securing the drive to the
bracket and rotating the drive out of the bracket.
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| 1 |
Screw |
| 2 |
Drive bracket |
| 3 |
Tabs (2) |
| 4 |
Secondary hard drive |
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When you replace a hard drive, set the jumpers on the replacement
drive to match the jumpers on the drive you removed. For additional information about
jumper settings on EIDE drives, see EIDE Subsystem.
As you insert the replacement hard drive into the drive bracket,
make sure that the two bracket tabs fit into the mounting holes on the side of the drive.
When you reinstall the hard drive assembly, make sure that the rails
on the assembly slide into the grooves of the card guide assembly.
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| 1 |
Power-supply mounting screws (2) |
| 2 |
Power supply |
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To remove the power supply:
- Disconnect the AC power cable from the power supply.
- Disconnect the DC power cables from the POWER connector and AUX POWER connector on the
system board.
- Disconnect the DC power cables from all the drives.
- Remove the two power-supply mounting screws from the back of the computer.
- Lift the power supply out of the computer.
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| 1 |
Fan assembly |
| 2 |
FAN 2 connector |
| 3 |
Release buttons |
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To remove the fan assembly:
- Disconnect the fan cable from the FAN 2 connector on the system
board.
While you push the fan assembly upward, press the two release buttons
on the back of the computer and lift the fan assembly out of the computer.
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| 1 |
Card guide assembly |
| 2 |
Mounting tabs (4) |
| 3 |
J8C3 connector |
| 4 |
Tab |
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To remove the card guide assembly:
- Disconnect any cables connected to full-length cards, and remove
these cards.
- Remove the 3.5-inch floppy drive.
- Remove the primary hard drive.
- Remove the secondary hard drive if one is present.
- Disconnect the control panel cable from the J8C3 connector on the system
board.
- Press the four mounting tabs that secure the card guide assembly to the front panel, and
press on the tab at the back of the card guide assembly.
- Lift the card guide assembly, including the control panel cable, out of the computer.
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| 1 |
Control panel board |
| 2 |
Mounting tab |
| 3 |
Card guide assembly |
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To remove the control panel board:
- Remove the front panel.
Remove the card guide assembly.
Press the mounting tab to release the control panel board from the
card guide assembly, and remove the control panel board.
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| 1 |
Retaining screw |
| 2 |
Card |
| 3 |
Card guide assembly |
| 4 |
Card connector |
| 5 |
Card connector |
| 6 |
Card-mounting bracket |
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To remove a card:
- Disconnect any cables from the card.
- Remove the retaining screw from the card-mounting bracket.
- Grasp the card by its corners, and carefully pull it out of its card connector.
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NOTE: Some AGP cards are secured by a clip. To remove these
cards, move the clip tab away from the card with your thumb while easing the card out of
its connector. |
To remove a memory module, press down and out on the securing clips
at each end of the socket. The module should pop up, allowing you to lift it out of the
socket.
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| 1 |
Cutout |
| 2 |
Securing tabs (2) |
| 3 |
Crossbars in central groove of socket (2) |
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NOTE: In the following procedure, be sure to install only
non-ECC PC133 synchronous dynamic random-access memory (SDRAM) memory modules for maximum
performance. |
To install a memory module:
- Orient the memory module so that the cutouts on its edge connector align with the
crossbars in the central groove of the socket.
- Insert the module straight down into the socket, making sure that it fits into the
vertical guides at each end of the socket.
- Press firmly until the module snaps into place.
NOTICE: Do not press near the middle of the module. Doing so
could break it.
If you have inserted the memory module correctly, the securing tabs
at each end of the socket snap into the cutouts at each end of the module.
NOTICE: Do not perform this procedure unless
you are upgrading the installed socketed processor and heat sink assembly with an
upgrade kit. Do not reuse the installed heat sink when replacing the socketed processor.
Doing so can cause the microprocessor to overheat because of an inadequate amount of
thermal compound between the heat sink assembly and the socketed processor.
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CAUTION: The socketed processor and heat sink can get extremely
hot during computer operation. Be sure that the assembly has had sufficient time to cool
before you touch it.
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CAUTION: When handling the socketed processor and heat sink
assembly, take care to avoid sharp edges on the heat sink.
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To remove a
socketed processor from the zero-insertion force (ZIF) socket connector:
- Remove the computer cover.
- Remove the fan shroud by pressing its two tabs and gently lifting the shroud until it
clears the fan and heat sink assemblies. Set the shroud aside.
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| 1 |
Shroud |
| 2 |
Heat sink |
| 3 |
Fan assembly |
| 4 |
Fan shroud tabs (2) |
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- Remove the fan assembly.
Remove the metal retaining clip that secures the heat sink assembly
to the socketed processor by gently pushing down on the folded part of the retaining clip
with a small screwdriver.
The retaining clip hooks over tabs on the sides of the ZIF socket connector.
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| 1 |
Retaining clip |
| 2 |
Heat sink assembly |
| 3 |
Socketed processor |
| 4 |
ZIF socket connector |
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CAUTION: The socketed processor and heat sink assembly can get extremely
hot. To avoid burns, be sure the processor and assembly have had sufficient time to cool
before you touch them. |
- Remove the heat sink assembly from the socketed processor.
NOTICE: Be careful not to bend any of the pins when you remove the socketed processor
from the ZIF socket connector. Bending the pins can permanently damage the microprocessor.
- Detach and lift the socketed processor away from the ZIF socket
connector.
The ZIF socket connector has a lever-type handle that secures and releases the socketed
processor from the ZIF socket connector.
- Pull the socket release lever straight out until the socketed
processor releases.
Remove the
socketed processor from the socket connector.
Leave the release lever extended so that the socket connector is ready for the
installation of a socketed processor.
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| 1 |
Socketed processor |
| 2 |
Socket release lever |
| 3 |
ZIF socket connector |
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To replace the socketed processor and heat sink
assembly:
- Unpack the new socketed processor.
NOTICE:
You must position the socketed processor correctly in the ZIF socket connector to avoid
permanent damage to the microprocessor and the computer when you turn on the computer.
- Install the socketed processor in the ZIF socket connector.
- If the release lever on the ZIF socket connector is not all the way
out, move it to that position now.
- Align pin 1 (the beveled corner) of the socketed processor and pin 1
of the ZIF socket connector.
Set the socketed processor lightly in the socket, making sure that
all the pins are headed into the correct holes.
Because your computer uses a ZIF socket connector, there is no need to use force (which
could bend the pins if the socketed processor is misaligned).
When the socketed processor is positioned correctly, press it with
minimal pressure to fully seat it in the ZIF socket connector.
When the socketed processor is fully seated, pivot the release lever
back toward the system board until it snaps into place, securing the microprocessor.
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| 1 |
Socketed processor |
| 2 |
ZIF socket connector |
| 3 |
Pin 1 (alignment corner) |
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- Unpack the heat sink included in your upgrade kit.
NOTICE:
Do not reuse the old heat sink when replacing the socketed processor. Doing so can cause
the microprocessor to overheat because of an inadequate amount of thermal compound between
the heat sink assembly and the microprocessor package.
- Replace the heat sink assembly.
- Peel the release liner from the adhesive tape that is attached to the bottom of the new
heat sink assembly.
- Place the heat sink assembly on top of the socketed processor.
- Orient the metal retaining clip as shown in the following illustration, and hook the
unhinged end of the clip over the tab on the top edge of the ZIF socket connector.
- Press down on the hinged end of the clip to snap the clip over the tab on the bottom
edge of the ZIF socket connector.
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| 1 |
Retaining clip |
| 2 |
Heat sink assembly |
| 3 |
Socketed processor |
| 4 |
ZIF socket |
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- Replace the fan assembly.
Place the fan shroud over the fan assembly and heat sink
assembly. Then
gently press down the shroud until the two fan shroud tabs snap into the two slots on top
of the fan assembly.
- Replace the computer cover, and reconnect the computer to an electrical outlet.
- Insert a diskette copy of the Dell Diagnostics into the diskette drive, and restart the
computer. Run the System Set test group in the Dell Diagnostics.
If the tests do not complete successfully, see
"Contacting Dell" in the Solutions Guide for instructions on obtaining
technical assistance.
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| 1 |
Battery |
| 2 |
Battery socket (BATTERY) |
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CAUTION: There is a danger of the
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. |
To remove the 3-volt (V), CR2032 coin-cell battery:
- Dell recommends that you write down the system configuration
information in the system setup program screens for future reference.
- Remove the computer cover.
NOTICE: Do not use a metal object to remove the battery from the socket when you
perform the next step. A metal object may short out the battery or the socket and damage
the system board.
NOTICE: If you pry out the battery with a blunt object,
insert the object between the battery and the socket. Otherwise, you may damage the system
board by prying off the socket or by breaking circuit traces on the system board.
- Pry the battery out of its socket (BATTERY) with your fingers or with a blunt,
nonconductive object such as a plastic screwdriver.
To replace the battery:
- Install the new battery with the "+" side facing up.
- Start the
system setup program, and
reset the System
Date and System Time settings.
Compare the system configuration settings and restore any system configuration
information that was lost when you replaced the battery.
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| 1 |
3.5-inch floppy drive |
| 2 |
Secondary hard drive bracket |
| 3 |
System board |
| 4 |
I/O gasket |
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To remove the system board:
- If possible, enter the
system setup program
and write down the system setup program screen information before you turn off the
computer because you will have to restore the configuration information after the system
board is replaced.
Disconnect any cables attached to the back of the computer.
Disconnect any cables connected to cards, and remove these cards.
Disconnect all internal cables from the system board.
Remove the socketed processor and heat
sink assembly.
- Remove the system-board mounting screw from the back of the computer,
as shown in the following figure.
 |
| 1 |
System-board mounting bracket |
| 2 |
Mounting screw |
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- Lift the system board from the three plastic standoffs that secure the system board to
the computer.
- Carefully lift the system board out from the I/O gasket (see
System Board), and remove the board from the computer.
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NOTE: You may need to slide the board toward the front of the
computer to clear the hooked standoffs before you can lift the board from the computer. |
- Remove the mounting bracket from the back of the system board as
shown in the following figure.
 |
| 1 |
System board-mounting bracket |
| 2 |
System board |
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Before you install a replacement system board:
- Install the socketed processor
and heat sink assembly.
Transfer the memory modules to the new system board.
When you install a replacement system board, angle the back of the
board downward and carefully align the connectors on the back edge of the board with the
cutouts in the I/O gasket (see System
Board). When properly aligned, the board connectors slide into the I/O gasket as you
lower the board into position in the computer and reseat it on the three plastic
standoffs. Then replace the system-board mounting screw.
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NOTE: The system-board mounting screw pulls the board against
the I/O gasket to prevent electromagnetic interference (EMI) leakage. |
After you install the replacement system board, replace the cards
that you removed from the old system board.
When you reconnect the cables to a system board with built-in sound,
connect the CD drive sound cable to the CD IN connector on the system
board. The TELEPHONY connector may be used
with a modem.
To configure the computer after you install a replacement board:
- Install the jumper plug on pins 2 and 3 of
configuration jumper BIOS CONF to select
Maintenance mode.
Replace the cover and start the computer.
The computer automatically starts the system
setup program, adds the Maintenance option to the menu bar, and
displays the Maintenance screen.
Select Clear All Passwords, and press <Enter> twice.
Press <F10> to exit the system setup program and save any changes you made.
Turn off the computer, remove the computer cover, and replace the jumper plug on pins 1
and 2 of configuration
jumper BIOS CONF to select Normal mode operation.
Replace the cover and boot the computer.
Reenter the system setup program, and reset the system configuration information.
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