iBook G3 Power problems, Flashing Red Light of Doom

Posted by: ketil_b

iBook G3 Power problems, Flashing Red Light of Doom - 02/05/09 04:22 PM

Hi all hope you are well

OK I found an iBook G3 500MHz that don't work. it will not power on. No fans no chimes.

when the power supply is plugged in, the connector it is constantly flashing red. If I unplug the DC-in board from the mobo then the connector go to green.

when the DC-in bored is plugged in I cant get a stable voltage on the out of the DC in bored.

the power brick looks good, I can get a stable voltage from it.

The only thing I can fined is this on the Apple site

http://discussions.apple.com/thread.jspa?messageID=6569071

What I would like to find out is what the flashing red light means (e.g over current, under voltage etc..)

My gut feeling is that a power chip on the mobo has gone and is shorting out.

Any one have an idea.

thanks

Ketil
Posted by: TonimusMaximus

Re: iBook G3 Power problems, Flashing Red Light of Doom - 02/05/09 09:23 PM

If memory serves me, flashing red means simply "PROBLEM." More than that, I'd have to agree with the Apple discussion of a PMU error.

P.S. Welcome to MacMod!