Service Manual

5. Remove the expansion cards from their sockets on the riser board, and remove any cables connected
to the expansion cards.
6. Remove the riser board from connectors J13 and J20 on the system board.
7. Remove the IDE ribbon cable connector from the secondary IDE connector (IDE SEC) on the system
board.
8. Remove the diskette drive ribbon cable connector from connector HD FLOPPY on the system board.
9. Remove the seven screws securing the system board to the chassis floor.
10. Carefully lift the system board up and out of the chassis. Be sure to lift evenly and not twist the system
board.
Place the system board on a smooth, antistatic surface.
11. Remove the microprocessor
.
12. Remove the memory modules.
To replace a system board, perform the following steps:
1. Lower the system board into the chassis and secure it with the seven screws.
2. Install the memory modules that you removed from the old system board.
3. Using the cleaning cloth provided with the new system board, wipe the top of the microprocessor die to
remove any of the old thermal grease.
After cleaning, the microprocessor die should have a reflective shine.
4. Insert the microprocessor into the ZIF socket on the new system board and lower the lever to lock it in
place.
5. Peel off the protective backing (if present) from the new heat-sink to expose the pad of thermal grease.
6. Place the heat sink on the microprocessor and ensure that the bevel on the heat-sink covers the raised
portion of the ZIF socket.
7. Replace the heat-sink clip onto the heat sink and secure it on the ZIF socket.
The longest side of the clip should be pointing to the front of the system.
8. Set the system board jumpers to the same settings on the board you removed.
9. Install the expansion card riser board and replace the expansion cards. Next, connect all internal
cables to the system board and to the expansion cards.