HP Pavilion DV6-1378 Maintenance And Service Manual page 180

Removal and Replacement Procedures
4. Use the optical drive connector 1 to lift the right side of the
system board 2 until it rests at an angle.
5. Slide the system board 3 to the right until the connectors on
the left side of the system board disengage from the
base enclosure.
6. Remove the system board.
Removing the System Board
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