Lenovo ThinkCentre M725s User Manual And Hardware Maintenance Manual page 57

CAUTION:
The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off the
computer and wait several minutes until the computer is cool.
1. Remove external options. See "Replacing external options" on page 14.
2. Remove the computer cover. See "Removing the computer cover" on page 16.
3. Remove the front bezel. See "Replacing the front bezel" on page 17.
4. Pivot the drive bay assembly upward. See "Pivoting the drive bay assembly upward and downward" on
page 20.
5. Remove the heat sink and fan assembly. See "Replacing the heat sink and fan assembly" on page 50.
6. Record the cable routing and cable connections, and then disconnect all cables from the system board.
See "System board" on page 5.
7. Replace the microprocessor.
Notes:
• Your microprocessor and socket might look different from the one illustrated.
• Touch only the edges of the microprocessor. Do not touch the gold contacts on the bottom.
• Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be
kept as clean as possible.
Figure 87. Releasing the handle
Figure 88. Removing the microprocessor
.
Chapter 4 Replacing hardware
53