System board replacement
Use the following procedures to remove and install a system board.
Before you return the system board, make sure that you install the CPU socket dust covers from the new system board. To replace a CPU socket dust cover:
Take a dust cover from the CPU socket assembly on the new system board and orient it correctly above the CPU socket assembly on the removed system board.
Gently press down the dust cover legs to the CPU socket assembly, pressing on the edges to avoid damage to the socket pins. You might hear a click on the dust cover is securely attached.
Make sure that the dust cover is securely attached to the CPU socket assembly.