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

13. Lock the retainer with the small handle to secure the microprocessor in the socket.
14. Use the thermal grease syringe to place five drops of grease on the top of the microprocessor. Each drop
of grease should be 0.03ml (3 tick marks on the grease syringe).
15. Install the heat sink and fan assembly on the system board.
16. Connect the heat sink and fan assembly cable to the system board. See "Identifying parts on the
system board" on page 71 .
17. Go to "Completing the FRU replacement" on page 92.

Replacing the microprocessor (Types 7390, 7391, and 7392)

Note: A thermal grease syringe is required to complete the microprocessor installation. Make sure the grease
syringe is available before beginning the procedure. The FRU number for the thermal grease is 91P8835.
1. Remove the cover. See "Removing the cover" on page 94.
2. Lift the fan duct off the heat sink fan.
3. Disconnect the heat sink and fan assembly cable from the system board. See "Identifying parts on the
system board" on page 95 .
4. 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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