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System board installation movie

To remove the system board:

1. Place the system in the service position.
2. Turn off the system and all attached peripheral devices.
3. Disconnect all power cords and all external signal cables. For easier access to components, place the system on its side. This is the recommended service position.
4. Remove the side cover. Press the cover release button on the right side cover, slide the cover to the rear and lift it off.
5. Rotate the drive cage to the service position.
6. Push the drive cage latch forward.
7. Grasp the drive cage handle and rotate the drive cage assembly up until until it locks in the open position.
8. Remove the DIMMs. Push out on the two latches.
9. Lift the DIMMs out of the socket and place it on a static protected surface. Remove any additional DIMMs in the same manner.
10. Remove the battery. Press on the rear edge of the battery until it slides out from under the spring retaining clip and lift it out.
11. Remove the fan duct assembly. Disconnect the processor fan cable from the system board.
12. Press down on the fan duct assembly release tab and lift up on the rear of the assembly to disengage the tabs on the fan duct from the slots on the chassis and left the assembly out of the chassis. Here is a closer look the slots in the chassis and the tabs on the fan duct assembly.
13. Remove the heat sink. Prior to removing the heat sink, the system should be powered on for a few minutes to soften the thermal layer, so that the heat sink can be easily removed.
14. Rotate the heat sink release lever to the open position.
15. Lift the top end of the heat sink up and disengage the bottom of the heat sink from the lip on the heat sink retention bracket. Here is a closer look at the lip of the heat sink retention bracket.
16. Remove the processor. Rotate the processor release lever to the open position.
17. Open the processor retainer.
18. Place the vacuum tool into the center of the processor and squeeze the tool to apply suction to the processor and then gently lift the processor straight up from the socket. Always place the protective cover over the processor contacts when the processor is out of the system. Use care not to touch the contacts as any contamination may damage them.
19. If the processor is going to be remove for any length of time, a dust cover must be installed to protect the socket from contamination.
20. Remove the following cables:
    1. front USB and audio
    2. SATA signal
    3. CD-ROM signal
    4. cover presence switch
    5. P1 power
    6. speaker
    7. diskette signal and P2 power
21. Remove the seven screws securing the system board to the chassis.
22. Slide the system board to the front of the system to release it from the tab of the chassis and lift the system board out.
    Here is a closer look at bracket on the system board and the alignment tabs in the chassis.

Additional information

View detailed system board removal and installation instructions for 8422, 8423, and 8427 systems.

Full service video CD available from http://www.pc.ibm.com/training.