Replacing The System Board - Lenovo 10A4 Hardware Maintenance Manual

Figure 51. Installing the microprocessor
11. Close the microprocessor retainer and lock it into position with the small handle to secure the new
microprocessor in the socket.
12. Reinstall the heat sink and fan assembly. See "Replacing the heat sink and fan assembly" on page 111.
13. Reconnect all cables that were disconnected from the system board.
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 150.

Replacing the system board

Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Safety information" on page 1.
This section provides instructions on how to replace the system board.
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.
To replace the system board, do the following:
1. Remove all 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. Lay the computer on its side for easier access to the system board.
3. Remove the computer cover. See "Removing the computer cover" on page 91.
4. Remove the front fan assembly from the chassis. See "Replacing the front fan assembly" on page 204.
5. Remove all memory modules and PCI cards that are currently installed. See "Installing or replacing a
memory module" on page 96 and "Installing or replacing a PCI card" on page 93.
Chapter 8
.
Replacing FRUs (machine types: 10A0, 10A1, 10A6, 10A7, 10AG, 10AK, 10AL, and 10BE)
115