Wow! A huge thanks to all of you so far! I didn't expect this many
replies. Here are some more details about it. I had checked it out to see
if it was dirty, and it looked pretty clean (also no charred components when
I glanced around inside). I can try cleaning it out again. All the fans
spool up for a few seconds before it just stops dead in its tracks. The
Apple P/N: 614-0157. It appears that there are no matches for this machine
out there at the moment (DigAudio, MDD, Sawtooth are all different!). Also,
the fans are all two wire as well, but if they are all working anyway I
wouldn't suspect that to be the issue. Another issue is that I have been
told it is remotely possible that the logic board is the problem instead.
That is much more expensive, and still difficult to tell which is causing
this strange problem.

-Chris

"James Sweet" wrote in message
news:AeRAf.1957$zh2.1452@trnddc01...
spudnuty wrote:
I was curious if anyone has information on repairing a power supply
for
a PowerMac G4 733 (Quicksilver). I believe the supply has an issue as
it
won't start up the machine, but it spins the fans for a few seconds
before
shutting down. Any suggestions or information would be appreciated as
the
replacement is quite costly!


Something worth checking out are the fans. I'm not sure if the Mac does
this, but many PC motherboards will shut down immediately if they detect
the CPU cooling fan is not running and will exhibit this exact same
behavior. They normally use 3 wire fans and monitor the tachometer line.