Gateway 450RGH Service Manual page 80

22
While pushing in on the PC Card eject button, remove the system board. Make sure
that the rear I/O panel clears the bottom of the chassis (shown by the top arrow)
and the side audio jacks clear the bottom of the chassis (shown by the left arrow).
23
Use a flat-blade screwdriver to turn the processor lock screw ¼-turn
counter-clockwise, then remove the processor from the old system board.
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Replacing the system board
75