Lenovo ThinkCentre M58p Hardware Maintenance Manual - Page 89
Replacing the microprocessor, Removing the heat sink and fan assembly
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CAUTION: The heat sink and fan assembly might be very hot. Turn off the computer and wait three to five minutes to let the computer cool before removing the computer cover. To replace the heat sink and fan assembly: 1. Remove the computer cover. See "Removing the computer cover" on page 73. 2. Lay the computer on its side. 3. Locate the heat sink and fan assembly. See "Locating parts on the system board" on page 76. 4. Disconnect the heat sink and the fan assembly cable from the microprocessor fan connector on the system board. See "Locating parts on the system board" on page 76. 5. Remove the four screws 1 that secure the heat sink and fan assembly to the system board. Figure 10. Removing the heat sink and fan assembly 6. Lift the failing heat sink and fan assembly off the system board. Note: You might have to gently twist the heat sink and fan assembly to free it from the microprocessor. 7. Position the new heat sink and fan assembly on the plastic retention bracket so that the four screws are aligned with the posts on the system board. Tighten the four screws to secure the new heat sink and fan assembly to the system board. 8. Connect the heat sink and fan assembly cable to the microprocessor fan connector on the system board. 9. Go to "Completing the FRU replacement" on page 103. Replacing the microprocessor Attention Do not open your computer or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to: http://www.lenovo.com/support Chapter 8. Replacing FRUs (Machine Types: 3063, 3231, 3285, 4084, 4085, 4086, 4087, 6138, 6209, 6239, 6302, 7188, 7244, 7347, 7355, 7358, 7373, 7484, 7571, 7628, 7635, 7639, 8494, 8854, 9728, 9960, and 9965.) 81