Lenovo 10AQ Maintenance Manual page 115

Attention:
Do not open your computer or attempt any repair before reading and understanding the "Important safety information"
in the Safety, Warranty, and Setup Guide that came with your computer. To obtain a copy of the Safety, Warranty, and
Setup Guide, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the system board.
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. Remove the computer cover. See "Removing the computer cover" on page 85.
3. Lay the computer on its side for easier access to the system board.
4. Remove the hard disk drive from the chassis. See "Replacing the hard disk drive" on page 87.
5. Remove the power supply assembly from the chassis. See "Replacing the power supply assembly"
on page 96.
6. Remove all memory modules and PCI cards that are currently installed. See "Installing or replacing a
memory module" on page 108 and "Installing or replacing a PCI card" on page 104.
7. Carefully take note of the locations of all cable connections on the system board and disconnect all
the cables. See "Locating parts on the system board" on page 73.
8. Remove the heat sink and fan assembly from the failing system board. See "Replacing the heat sink and
fan assembly" on page 99.
9. Remove the eight screws that secure the system board.
Figure 42. Removing the eight screws that secure the system board
.
Chapter 9 Replacing FRUs (machine type: 10AR)
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