Replacing The System Board (Types 7390, 7391, And 7392) - Lenovo 7387 Hardware Maintenance Manual

18. Lower the microprocessor retainer.
19. Lock the retainer with the small handle to secure the microprocessor in the socket.
20. The new retention bracket has plastic one-way rings on the posts that insert into the rear of the new
system board. Install the new retention bracket by aligning the posts on the module with the holes in the
system board and pushing the posts through the holes until the retention bracket is secure.
21. Install the heat sink and fan assembly on the new system board.
22. Install the new system board into the chassis and align the screw holes with those in the chassis. Insert
and tighten the screws that secure the system board.
23. Connect all cables to the system board. See "Identifying parts on the system board" on page 95.
24. Replace the hard disk drive. See "Replacing the hard disk drive" on page 114.
25. Install the drive bay assembly and connect the power and signal cables to the drives.
26. Reinstall any PCI adapter cards that were removed. See "Replacing a PCI adapter" on page 99.
27. Position the fan duct on the heat sink fan.
28. Go to "Completing the FRU replacement" on page 117.

Replacing the system board (Types 7390, 7391, and 7392)

1. Remove the cover. See "Removing the cover" on page 94.
2. Lift the fan duct off the heat sink fan.
3. Remove any adapter cards installed in the PCI connectors. See "Replacing a PCI adapter" on page 99.
4. Remove the drive bay assembly. See "Removing and replacing the drive bay assembly" on page 97.
5. Take note of the location of all cable connections on the system board and disconnect all cables. See
"Identifying parts on the system board" on page 95.
6. Remove the hard disk drive. See "Replacing the hard disk drive" on page 114.
7. Remove the screws that secure the system board to the chassis.
8. Lift the system board out of the chassis.
9. Remove the retention module from the rear of the failing system board.
10. Remove the memory modules from the failing system board and install them in the same location on
the new system board.
11. Disconnect the heat sink and fan assembly cable from the system board. See "Identifying parts on the
system board" on page 95 .
12. Rotate handle 1 to release the heat sink clamp and then disengage the clamp from the plastic retention
bracket.
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Chapter 9 Replacing FRUs (Types 7390, 7391, 7392, 7396, 7397, and 7398)
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