HP 1150NR - Mini - Atom 1.6 GHz Maintenance And Service Manual page 70

Removal and replacement procedures
4. Remove the four Phillips PM2.0×4.0 screws 1 that secure the system board to the base enclosure.
5. Lift the left side of the system board 2 until it rests at an angle.
6. Remove the system board 3 by sliding it up and to the left at an angle.
Reverse this procedure to install the system board.
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