Replacing The Microprocessor - Lenovo ThinkCentre M79 Hardware Maintenance Manual

9. Connect the new power supply assembly cables to all drives and the system board. See "Locating
parts on the system board" on page 34.
10. Lower and position the heat sink fan duct on the top of the heat sink and fan assembly until the two
screw holes in the heat sink fan duct are aligned with those in the heat sink and fan assembly. Install
the two screws to secure the heat sink fan duct.
Figure 49. Installing the heat sink fan duct
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to "Completing the parts replacement" on page 151.

Replacing the microprocessor

Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Read this first: Important safety information" on page 1.
CAUTION:
The heat sink and microprocessor 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 microprocessor, do the following:
1. Remove any media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See "Removing the computer cover" on page 105.
3. Locate the system board and disconnect all cables connected to the system board. See "Locating
parts on the system board" on page 34.
4. Remove the heat sink and fan assembly with the fan duct. See "Replacing the heat sink and fan
assembly" on page 126.
Note: Place the heat sink and fan assembly on its side so that the thermal grease on the bottom of it
does not get in contact with anything.
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ThinkCentre M79 Hardware Maintenance Manual