Lenovo ThinkCentre M57 Hardware Maintenance Manual - Page 131

Replacing the system board Important The heat sink and microprocessor might be very hot. Make sure these components are cool enough to safely handle before continuing this procedure. 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. This procedure describes how to remove and replace the system board. 1. Open the computer cover. See "Opening the cover" on page 118. 2. Pivot the drive bay assembly upward to gain access to the system board. 3. Remove the PCI riser. See "Replacing a PCI adapter" on page 142. 4. Locate the rear fan bracket assembly and the rear fan connector. See "Locations" on page 114 and "System board connectors" on page 117. 5. Disconnect the rear fan cable and remove the rear fan bracket assembly by lifting it off the system board. 6. Take note of the location of all cable connections on the system board. It will be necessary to reconnect them properly when installing a new system board. 7. Disconnect all cables connected to the system board. See "System board connectors" on page 117. 8. Take note of the location of the memory modules and remove them from the failing system board. See "Replacing a memory module" on page 119. Chapter 9. Replacing FRUs - Ultra SFF Desktop computers 125