Lenovo ThinkCentre Edge 92 Hardware Maintenance Manual (HMM) (July 2012) - Thi - Page 107

Replacing the system board

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10. Lower the new microprocessor straight down into the microprocessor socket on the system board. Figure 33. 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 99. 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 replacement, go to "Completing the parts replacement" on page 118. Replacing the system board Attention: Do not open your computer or attempt any repair before reading and understanding "Important 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. Turn off the computer and wait three to five minutes to let the computer cool before removing the computer cover. 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 83. 3. Lay the computer on its side for easier access to the system board. Chapter 9. Replacing FRUs (machine types: 3376, 3378, and 3387) 103

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10. Lower the new microprocessor straight down into the microprocessor socket on the system board.
Figure 33. 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 99.
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 replacement, go to “Completing the parts replacement” on page 118.
Replacing the system board
Attention:
Do not open your computer or attempt any repair before reading and understanding “Important 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. Turn off the computer and wait three to five
minutes to let the computer cool before removing the computer cover.
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 83.
3. Lay the computer on its side for easier access to the system board.
Chapter 9
.
Replacing FRUs (machine types: 3376, 3378, and 3387)
103