Lenovo ThinkCentre A61 Hardware Maintenance Manual - Page 98

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 side cover. See "Removing the computer cover" on page 87. 2. Place the computer on its right side to help make the system board more accessible. 3. Remove any PCI adapter cards installed. "Replacing a PCI adapter card" on page 100 4. Disconnect the signal and power cables from the hard disk drive. 5. Press the release tab 1 down, slide the hard drive cage 2 back, and pivot the hard disk drive outward as shown. 92 Hardware Maintenance Manual