Manuals

After you remove or replace parts in the system, observe the following notice to prevent damage to the system.

Recommended Tools

• Small flat-blade screwdriver
• Wide flat-blade screwdriver
• #1 and #2 Phillips-head screwdrivers
• 1/4-inch nutdriver
• Tweezers or long-nose pliers
• Wrist grounding strap

Figure 1. Removing the Cover

1 Release latch 2 Computer cover

To remove the computer cover, perform the following steps.

1. Face the front of the chassis. Place your left hand on the left side of the chassis. Push back the release latch at the top back edge of the chassis to release the computer cover into your left hand (see Figure 1).
2. Lift the cover out from the curves at the bottom of the chassis.

   	CAUTION: To prevent cuts, keep your hands clear of the metal edges on the chassis and fan guard as you slide the cover back.

To replace the computer cover, perform the following steps:

1. Check all cable connections, especially those that might have come loose during your work. Fold cables and unused connectors out of the way so that they do not catch on the computer cover or interfere with airflow inside the computer.
2. Check to see that no tools or extra parts (including screws) are left inside the computer.
3. Place the chassis upright with the front facing you. Align the computer cover so its bottom hooks fit in the chassis curves.
4. Lift up the cover, making sure to keep the bottom hooks aligned with the curves in the chassis.
5. Gently squeeze the right and left sides of the computer together until the cover clicks into position.

Rotating Power Supply

Figure 2. Rotating the Power Supply

1 Release latch 2 Power supply 3 Cable retainer

1. Remove the computer cover.
2. Lay the computer on its side (see Figure 2).
3. Press the release latch while lifting the power supply (see Figure 2). Rotate the power supply out of the chassis while keeping the power cables clear.
4. When you rotate the power supply back into the chassis, gently lift the cable retainer and hold the drive cables out of the way.
5. Rotate the power supply into position until its release latch clicks.
6. Wrap the drive cables along the top of the latch in the retainers (see Figure 3).

Figure 3. Cable Placement

1 Cable retainer 2 Drive power cables 3 Power supply

Bezel

Figure 4. Removing the Bezel

1 Bezel release tab 2 Retaining hooks

To remove the bezel, perform the following steps:

1. Remove the computer cover.
2. While facing the front of the computer, press in the bezel release tab the top of the chassis (see Figure 4).
3. Swing the bezel away from the chassis, disengage the two retaining hooks on the bezel, and carefully pull it away from the chassis.
4. To replace the bezel, fit the bezel's two retaining hooks into their corresponding slots on the chassis. Rotate the bezel toward the chassis until the bezel latches into position.

3.5-Inch Front-Panel Insert

Figure 5. Removing a 3.5-Inch Insert

1 Insert 2 Tabs (2) 3 Release tab

To remove a 3.5-inch insert, perform the following steps:

1. Remove the bezel.
2. From the back of the bezel, press the release tab to the side (see Figure 5).
3. Rotate the insert toward you, and remove it from the bezel.

Upper 3.5-Inch Drive

Figure 6. Removing a 3.5-Inch Drive Bay Plate

1 Drive bay plate

To remove the upper 3.5-inch drive plate and install a new drive, perform the following steps:

1. Remove the bezel.
2. Remove the 3.5-inch front panel insert.
3. Rotate the power supply away from the system board. While holding the power supply, stand the computer up.
4. Remove the metal plate covering the bay (see Figure 6). Using a screwdriver, pop out the metal plate from the left or right side of the chassis.
5. Remove the extra rails from the inside front of the chassis.
6. Install the rails on the sides of the drive. The rails are marked “L” for installation on the left side of the drive and “R” for the right side of the drive.
7. Slide the drive assembly into the drive bay and connect the cables.

Lower 3.5-Inch Diskette Drive

Figure 7. Removing the Lower 3.5-Inch Drive

1 Drive-release rail tabs (2)

To remove the 3.5-inch diskette drive from the lower bay, perform the following steps:

1. Remove the bezel.
2. Rotate the power supply away from the system board. While holding the power supply, stand the computer up.
3. Disconnect the power and interface cables from the back of the diskette drive.
4. Press the two drive-release rail tabs, and slide the drive out of the drive bay (see Figure 7).

Before you install the new drive, transfer the drive-release rails to the replacement diskette drive.

5.25-Inch Drive

Figure 8. Removing the 5.25-Inch Drive

1 Drive-release rail tabs (2)

To remove the 5.25-inch drive, perform the following steps:

1. Remove the bezel.
2. Rotate the power supply away from the system board. While holding the power supply, stand the computer up.
3. Disconnect the power and interface cables from the back of the drive.
4. Press the two drive-release rail tabs, and slide the drive out of the drive bay (see Figure 8).

Before you install the new drive, transfer the drive-release rails to the replacement drive.

Hard-Disk Drive

Figure 9. Removing the Hard-Disk Drive

1 Screws (2) 2 Clip 3 Hard-disk drive

To remove the primary hard-disk drive, perform the following steps:

1. Remove the bezel.
2. Rotate the power supply away from the system board. While holding the power supply, stand the computer up.
3. Remove the two screws securing the hard-disk drive to the front of the chassis (see Figure 9).
4. Release the clip that secures the drive to the chassis and rotate the drive out of the chassis (see Figure 9).
5. Disconnect any cables attached to the drive.
6. Remove the existing drive from the bay.

To reinstall the primary hard-disk drive, perform the following steps:

1. Orient the new drive with its circuit board facing the front of the chassis.
2. Press the drive between the two brackets until the drive is secured by the clip.
3. Secure the drive to the front of the chassis with the two screws you removed.
4. Connect the DC power cable and the hard-disk drive interface cable.

Power Supply and Fan Assembly

Figure 10. Removing the Power Supply and Fan Assembly

1 Power-supply retaining clips 2 Power supply and fan assembly

To remove the power supply and fan assembly, perform the following steps:

1. Disconnect the AC power cable from the power supply.
2. Remove the computer cover.
3. Rotate the power supply away from the system board.
4. Disconnect the DC power cables from the POWER and OPTIONAL POWER  connectors on the system board.
5. Disconnect the DC power cables from all the drives.
6. Press the power-supply retaining clips and lift the power supply and fan assembly out of the chassis (see Figure 10).

Control Panel

Figure 11. Removing the Control Panel

1 Control panel assembly 2 Mounting tabs

To remove the control panel, perform the following steps:

1. Remove the bezel.
2. Press the mounting tabs to release the control panel and remove the control panel assembly (see Figure 11).

Expansion Cards

Figure 12. Installing an Expansion Card

1 Card edge connector 2 Expansion card 3 Expansion card connector

To install an expansion card, perform the following steps:

1. Remove the computer cover.
2. Rotate the power supply.
3. Choose an expansion-card connector for the card.
4. Unscrew and remove the metal filler bracket that covers the card-slot opening for the expansion slot you intend to use.
5. Insert the expansion card firmly into the expansion-card connector (see Figure 12).
   

Cutouts in the card-edge connector align with crossbars in the expansion card connector. Gently rock the connector until it is fully seated.

6. When the card is firmly seated in the connector, secure the card-mounting bracket with the screw you removed.

To remove an expansion card, perform the following steps:

1. Remove the computer cover.
2. Rotate the power supply.
3. Disconnect any cables connected to the card.
4. Remove the screw from the card-mounting bracket.
5. Grasp the card by its top corners, and ease it out of its connector.
6. If you are removing the card permanently, install a metal filler bracket over the empty card-slot opening in the chassis.

NOTE:  Installing filler brackets over empty card-slot openings is necessary to maintain Federal Communications Commission (FCC) certification of the system. The brackets also keep dust and dirt out of your computer.

DIMMs

Figure 13. Removing DIMMs

1 Securing clips (2)

To remove a dual in-line memory module (DIMM), press down and out on the securing clips at each end of the socket (see Figure 13). The DIMM should pop up allowing you to lift it out of the socket.

Figure 14. Installing a DIMM

1 Securing clips (2) 2 Cutout

To install a DIMM, perform the following steps:

1. Remove the computer cover.
2. Rotate the power supply.
3. Press outward on the plastic securing clips at each end of the DIMM socket to release the clips (step 1 in Figure 14).
4. Orient the DIMM so that the cutouts on its edge connector align with the crossbars in the central groove of the socket (step 2 in Figure 14).
5. Insert the DIMM straight down into the socket, making sure that it fits into the vertical guides at each end of the socket (step 3 in Figure 14).
6. Press firmly until the DIMM snaps into place.

If you have inserted the DIMM correctly, the securing tabs at each end of the socket snap into the cutouts at each end of the DIMM.

Heat Sink

Figure 15. Removing and Replacing the Heat Sink

1 Heat sink and fan assembly 2 Heat-sink securing clip 3 Microprocessor 4 Microprocessor socket 5 Heat-sink securing tab

The heat sink in your system will be one of those pictured in Figure 15. To remove and replace the microprocessor and heat sink, perform the following steps:

1. Remove the computer cover.
2. Rotate the power supply.
3. Locate the microprocessor socketed connector on the system board.
4. Release the metal clip that secures the heat sink and fan assembly to the microprocessor socketed connector (see Figure 15). Then remove the heat sink and fan assembly from the microprocessor chip.
5. Disconnect the fan from the system board.
6. Remove and replace the microprocessor chip from the socket.
7. Unpack the heat sink and fan assembly included in your upgrade kit.

NOTICE: Ground yourself by touching an unpainted metal surface on the back of the computer.

7. Peel the release liner from the adhesive tape that is attached to the bottom of the heat sink and fan assembly.
8. Replace the heat sink and fan assembly by performing the following steps:

1. Place the heat sink and fan assembly on top of the microprocessor chip (see Figure 15).
2. Orient the securing clip and hook the shorter side of the clip over the tab on the top edge of the socketed connector.
3. Press down on the top to the fan to snap the clip over the tab on the bottom edge of the socketed connector.
4. Connect the fan to the system board.

9. Replace the computer cover, and then reconnect your computer and peripherals to their electrical outlets and turn them on.

As the system boots, it detects the presence of the new microprocessor and automatically changes the system configuration information in the system setup program.

10. Enter the system setup program, and confirm that the Processor Type and Processor Speed option correctly identifies the installed microprocessor.

Microprocessor

Figure 16. Removing the Microprocessor

1 Microprocessor chip 2 Release lever 3 Microprocessor socketed connector

NOTICE: Be careful not to bend any of the pins when you remove the microprocessor chip from its socket. Bending the pins can permanently damage the microprocessor chip.

Your microprocessor socket is a zero insertion force (ZIF) socket with a lever-type handle that secures the chip in, or releases it from, the socket.

1. To remove the chip, pull the microprocessor-socket release lever out to unlock it and then straight up until the chip is released (see Figure 16).
2. Remove the chip from the socket. Leave the release lever extended so that the socket is ready for the new microprocessor.

NOTICE: Ground yourself by touching an unpainted metal surface on the back of the computer.

NOTICE: Be careful not to bend any of the pins when you unpack the microprocessor. Bending the pins can permanently damage the microprocessor.

3. Unpack the new microprocessor.

If any of the pins on the chip appear to be bent, obtain technical assistance.

4. Align the pin-1 corner of the microprocessor chip with the pin-1 corner of the microprocessor socket (see Figure 17).

NOTE: You must identify the pin-1 corner to correctly position the chip.

The pin-1 corner of the microprocessor is the beveled corner. The pin-1 corner of the socket, labeled "1," is the front-left corner of the socket as you face the back of the computer.

Figure 17. Replacing the Microprocessor Chip

1 Pin-1 corners of chip and socket aligned

5. Install the microprocessor chip in the socket (see Figure 17) by performing the following steps.
   

NOTICE: You must position the microprocessor chip correctly in the socket to avoid permanent damage to the chip and the computer when you turn on the system.

1. If the release lever on the microprocessor socket is not all the way out, move it to that position now.
2. With the pin-1 corners of the chip and socket aligned, align the pins on the chip with the holes in the socket.
3. Set the chip lightly in the socket and make sure that all pins are headed into the correct holes. Because your system uses a ZIF microprocessor socket, you do not need to use force, which could bend the pins if the chip is misaligned. When the chip is positioned correctly, press it with minimal pressure to seat the microprocessor. Be careful not to bend the pins.
4. When the chip is fully seated in the socket, pivot the microprocessor-socket release lever back toward the socket until it snaps into place, securing the chip.

Battery

Figure 18. Replacing the System Battery

1 Battery 2 Battery socket

	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, perform the following steps:

1. Make a copy of the screens in the system setup program. Enter the system setup program, and print (by pressing the <Print Screen> key) or copy the system configuration information from the system setup screens.
2. Remove the computer cover.
3. Rotate the power supply.
4. Pry the battery out of its socket with your fingers or with a blunt, nonconductive object such as a plastic screwdriver.

To replace the battery, perform the following steps:

1. Install the new battery with the "+" side facing up (see Figure 18).
2. Rotate the power supply back into place, replace the computer cover, and reconnect your computer and devices to their electrical outlets and turn them on.
3. Reboot the computer system, press <Del> when the blue Dell logo screen appears to enter the system setup program, and restore the correct settings

System Board

Figure 19. Removing the System Board

1 System-board retaining clip 2 System board 3 Standoffs

1. If possible, enter the system setup program and print the system setup screens by pressing the <Print Screen> key before you turn off the computer because you will have to restore the configuration information after the system board is replaced.
2. Remove the computer cover.
3. Remove the power supply.
4. Disconnect any cables connected to expansion cards, and remove these expansion cards.
5. Disconnect all internal cables from the system board.
6. Remove the >heat sink assembly.
7. Remove the microprocessor.
8. Push the system-board retaining clip until it disengages (see Figure 19).
9. Slide the system board forward until is no longer held by the standoffs that secure the system board to the chassis.

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.

10. Carefully lift the system board out from the input/output (I/O) gasket and remove the board from the computer. The I/O gasket is on the back of the computer where all of the input and output ports are located (see the 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. When properly aligned, the board connectors slide into the I/O gasket as you lower the board into position in the chassis and reseat it on the standoffs. Lock the board in with the system-board retaining clip.

After you install the replacement system board, replace the microprocessor, the heat sink, the DIMMs, and the expansion cards that you removed from the old system board.

To configure the system after you install a replacement board, perform the following steps:

1. Install the jumper plug on pins 2 and 3 of configuration jumper J7A1 to select Maintenance mode operation.
2. Replace the cover and start the system.
   The computer automatically starts the system setup program, adds the Maintenance option to the menu bar, and displays the Maintenance screen.
3. Select Clear All Passwords and press <Enter> twice.
4. Press <F10> to exit the system setup program and save any changes you made.
5. Turn off the system, remove the computer cover, and replace the jumper plug on pins 1 and 2 of configuration jumper J7A1 to select Normal mode operation.
6. Replace the cover and start the system.
7. Reenter the system setup program and reset the system configuration information.