Lenovo ThinkCentre A61 Hardware Maintenance Manual - Page 132

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 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. Note: When replacing the system board you must also order a new retention module for the new system board. Make sure you have a retention module for the new system board before continuing with this procedure. To replace the system board: 1. Remove the cover. See "Removing the computer cover" on page 117. 2. Lift the fan duct off the heat sink fan. 3. Remove any adapter cards installed in the PCI connectors. 4. You might have to remove the drive bay assembly to access the system board. See "Accessing the system board components and drives" on page 119. 5. Take note of the location of all cable connections on the system board and disconnect all cables. See "Locating parts on the system board" on page 119. 6. Remove the hard disk drive. See "Replacing the hard disk drive" on page 132. 7. Remove the screws that secure the system board to the chassis. 8. Lift the system board out of the chassis. 9. Remove the memory modules from the failing system board and install them in the same location on the new system board. 126 Hardware Maintenance Manual