a friend gave me a dead iMac 17" G5 iSight.  the symptom is:
when i push the power button, the pilot light comes on for about a
second, then the fan comes on at full speed, then about a second later
the pilot light and the fan turn off.  the screen never lights up and
there is no startup chime.  i've tried resetting SMU by unplugging,
then replugging while depressing the power button, then releasing and
re-pushing the power button.  same behavior as described above.

any ideas on how to troubleshoot this?  i did some googling, and there
is a link to an apple support doc for this problem for a non-isight
model (describes taking rear cover off, which clearly can't be done
with the isight model) but nothing other than uninformed speculation
on message boards about the isight G5.  i have dissassembled it and
looked for power supply diagnostic LED's but if they are there they're
not obvious.

thanks in advance for any ideas

ken

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