Lenovo M58e Hardware Maintenance Manual - Page 137

Replacing the system board Attention Do not open your computer or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to: http://www.lenovo.com/support 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 opening the computer cover. This section provides instructions on how to remove and replace the system board. 1. Open the computer cover. See "Opening the cover" on page 125. 2. Pivot the drive-bay assembly upward to gain easier access to the system board. 3. Disconnect all cables connected to the system board. See "System board connectors" on page 124. 4. Remove the hard disk drive and disconnect it from the system board. See "Replacing the hard disk drive" on page 138. 5. Remove any adapter cards installed in the PCI connectors. See "Installing or replacing an adapter card" on page 147. 6. Remove the heat sink and microprocessor from the failing system board. See "Replacing the microprocessor" on page 134. 7. Remove the memory modules from the failing system board and install them into the same position on the new system board. See "Replacing a memory module" on page 127. Chapter 9. Replacing FRUs - 607 computers 131