To prepare the computer for removal and replacement procedures, complete the following steps:

1	Remove any diskette, compact disc, or tape from the computer.
2	Turn off the computer and any peripheral devices that are connected to the computer.

CAUTION: The computer power switch should be turned off before you disconnect any cables.

3	Disconnect the power cord from the electrical outlet, and then from the computer.
4	Disconnect all peripheral device cables from the computer.

IMPORTANT:

During disassembly, label each cable as you remove it. Be sure to note its position and routing.

Step 2:

Remove Chassis

Chassis Removal 2 Remove the three screws from the back of the computer as shown. 3 With one hand, grasp the handle on the back of the computer chassis while holding the cover with the other hand, and pull until the chassis stops. 4 Lift up on the chassis and pull it completely out of the cover. Replacement To replace the chassis, reverse this procedure.

Step 3:

Power Supply 3 Gently lay the computer on its side (rear connectors should be closest to the working surface). 4 Remove the four screws that secure the power supply to the rear of the chassis as shown. 5 Slide the power supply away from the back of the chassis, flip it up and away, and slide it to the right to remove it from the slots. Replacement To replace the power supply, reverse this procedure.

Step 4:

Remove Floppy Drive

Mass Storage Devices - Index Page 1 CDRom/DVD Drive 2 3.5" or 5.25" Hard Drive 3 Zip Drive (only on selected models, not on 7471) 4 Diskette Drive

Step 5:

Remove Fax/Modem

Fax/modem Removal 4 Remove the screws holding the option card bracket to the chassis. 5 Remove the bracket and pull the fax/modem out of the slot. Replacement   To replace the fax/modem, reverse this procedure.

Step 6:

Remove Memory Modules

System Board Components Memory Module (DIMM) Removal 7 Release the retention clips of the socket and unplug the DIMM from the system board. Replacement To replace the DIMM, reverse this procedure

Step 7:

Remove Cables and System Board Screws

System Board Components System Board Removal 8 Remove all cables form the system board. 9 Remove the six screws from the system board (may differ slightly from photo) and separate it from the bracket. Replacement   To replace the system board, reverse this procedure. NOTE: The system board spare part kit does not include the processor, cache, DIMM, or video expansion module. The components must be transferred from the old system board to the new system board.