Dell OptiPlex GX240 Service Manual page 143

Set the jumpers on the replacement system board so it is identical to
5
the one on the existing board.
Orient the replacement board by aligning the notches on the bottom
6
to the tabs on the computer floor.
Slide the board toward the back of the computer until it clicks into
7
place.
Replace any components and cables that you removed from the system
8
board.
Reconnect all cables to their connectors at the back of the computer,
9
close the computer cover, and reconnect the computer and devices to
their power sources and turn them on.
NOTE: After you close the cover, the chassis intrusion detector causes the
following message to be displayed at the next computer start-up:
ALERT! Cover was previously removed.
Reset the chassis intrusion
10
detector.
NOTE:
Some
components and
connectors on the
replacement system board
may be in different
locations than the
corresponding connectors
on the existing system
board.
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S ys t em B o a r d