Before you begin, remove
the following:
•Top cover
•Fan
Review the ESD
precautions in Bulletins/
Safety.
Logic Board
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1 Disconnect the following
cable connectors from
the logic board:
•Hard drive power
cable
•Hard drive data cable
•Floppy drive cable
•Power supply cable
•Fan cable (LC II/III/
LC 475 and Quadra
605)
•Speaker cable (LC II/
III/LC 475 and
Quadra 605)
2 Remove the expansion
card (if installed).
Caution:
In the next step,
be sure the power on/off
button clears the rear panel
before you remove the logic
board. While lifting the
board, do not touch any
components or connectors on
the back of the logic board.
(The oil from your skin can
harm the connectors.)
Take Apart Logic Board - 21
3 Using your forefingers,
spread the two latches
that secure the logic
board to the bottom case.
At the same time, using
your right thumb, push
on the expansion
connector and slide the
logic board toward the
front of the case.
Take out the logic board and wash in cold-slightly warm water with a little soap in a dishwasher or bathtub.