Lenovo ThinkCentre M55e Hardware Maintenance Manual - Page 111
Replacing the microprocessor, Types 8702
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Replacing the microprocessor The procedure to replace the microprocessor varies depending upon the machine type. Types 8702, 8706, 8970, 8972, 8980, 8982, 8992, 8994, 9276, 9278, 9286, 9288, 9378, 9380, 9628, 9632, and 9649 Important The heat sink and microprocessor might be very hot. Make sure these components are cool enough to safely handle before continuing this procedure. 1. Remove the cover. See "Removing the cover" on page 87. 2. Lift the fan duct off the heat sink fan. 3. Disconnect the heat sink and fan assembly cable from the system board. See the system board illustration for your machine type at "Identifying parts on the system board" on page 89. 4. Remove the four screws securing the heat sink and fan assembly to the system board. 5. Lift the heat sink and fan assembly off the system board. Place the heat sink on its side so that the thermal grease does not come in contact with anything. Note: You might have to gently twist the heat sink to free it from the microprocessor. 6. To remove the microprocessor 2 from the system board, lift the small handle 3 and open the retainer 1 . Chapter 8. Replacing FRUs (desktop computers) 105