Apple Xserve Intel (Late 2006) DIY Procedure for Logic Board - Manual (Page 14)

Xserve (Late 2006) Logic Board Replacement Instructions 1
Release the nine thumbscrews that secure the logic board to the enclosure (highlighted in
the illustration below).
Note: The thumbscrews are captive; you cannot remove them.
Grasping the logic board by its thumbscrews only, move it forward and up slightly to release
it from the rear port openings in the enclosure.
Continue to grasp the logic board by its thumbscrews and edges to lift and remove it from
the Xserve.
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