Replacing The Microprocessor - Lenovo THINKCENTRE M79 User Manual

5. Lay the computer on its side and remove the four screws at the rear of the chassis that secure the
power supply assembly. Then slide the power supply assembly to the front of the computer and then lift
it out of the chassis.
Figure 30. Removing the screws for the power supply assembly
6. Ensure that the new power supply assembly is the correct replacement.
7. Install the new power supply assembly into the chassis so that the screw holes in the power supply
assembly align with those in the chassis.
8. Install and tighten the four screws to secure the power supply assembly.
Note: Use only screws provided by Lenovo.
9. Reconnect the power supply assembly cables to the system board and each of the drives.
10. Secure the power supply assembly cables with the cable clips and ties in the chassis.
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 106.

Replacing the microprocessor

Attention: Do not open your computer or attempt any repair before reading and understanding the "Read
this first: Important safety information" on page v.
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:
.
Chapter 9 Installing or replacing hardware
85