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Removal and replacement procedures 54
To remove the system board:
1. Power down the server (on page 23).
2. Disconnect the power cord from the AC source.
3. Disconnect the power cord from the server.
4. Remove the chassis cover (on page 26).
5. Remove the system board assembly.
WARNING: To reduce the risk of personal injury from hot surfaces, allow the heatsink to cool
before touching it.
CAUTION: Heatsink retaining screws should be tightened or loosened in diagonally opposite
pairs (in an "X" pattern). Do not overtighten the screws as this can damage the board, connectors,
or screws. Use the wrench supplied with the system to reduce the possibility of overtightening the
screws.
6. Remove the heatsink:
a. Loosen one pair of diagonally opposite screws halfway, and then loosen the other pair of screws.
b. Completely loosen all screws in the same sequence.
c. Remove the heatsink from the processor backplate.
CAUTION: To avoid damage to the processor, do not touch the bottom of the processor,
especially the contact area.
7. Open the processor locking lever, and then open the processor retaining bracket.