When replacing the system board, be sure that the following components are removed from the defective system board and installed on the replacement system board:

Memory module (see Memory module on page 42)

RTC battery (see RTC battery on page 71)

Fan and heat sink (see Fan/heat sink assembly on page 73)

Processor (see Processor on page 79)

Remove the system board:

1.Disconnect the optical drive connector cable from the system board.

2.Remove the Phillips PM2.5×6.0 screw (1) that secures the system board to the base enclosure.

3.Lift the right side of the system board (2) until it rests at an angle.

Component replacement procedures

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HP CQ57-218NR, CQ57-229WM, CQ57-212NR, CQ57-214NR manual