Lenovo ThinkCentre M57 Hardware Maintenance Manual - Page 106
Replacing, microprocessor
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Replacing the microprocessor This procedure describes how to remove and replace the power supply. The procedure varies depending upon the machine type. 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 89. 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 "System board connectors" on page 88. 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. 100 Hardware Maintenance Manual