System Board; System Board Connectors - Dell ChengMing 3901 Tower Service Manual

Steps
1. Ensure that the release lever is fully extended in the open position.
CAUTION: You must place the processor correctly in the processor socket to avoid damage to the processor.
2. Align the pin-1 corner of the processor with the pin-1 corner of the processor socket, and then place the processor in the
processor socket.
NOTE: The pin-1 corner of the processor has a triangle that aligns with the triangle on the pin-1 corner on the processor
socket. When the processor is properly seated, all four corners are aligned at the same height. If one or more corners of
the processor are higher than the others, the processor is not seated properly.
3. When the processor is fully seated in the socket, close the processor cover.
4. Press down and push the release lever under the securing tab to lock it.
Next steps
1. Follow the procedure in
2. Install the heat sink and fan
3. Install the fan duct.
4. Install the side cover.

System board

System board connectors

The following image indicates the connectors on your system board:
1. Intrusion switch
3. Memory module connectors
5. Coin-cell battery
After working inside your
assembly.
computer.
2. ATX CPU Power Connector
4. Power switch
6. System power connector
Removing and installing components 51