Re: Imac G5 17" - no powerup (& bulging PS caps)

Toasty -

Thx for the pinouts. extremely helpful.

Will jumpering the psu without loading it cause any issues, do you think?
Do I keep it shorted to turn on or is it a toggle?

Oops... Yes, I did indeed mean 'I'... I meant the cap that was shaded black on the diagram.

I didn't have any intention of touching H since on most of the Japanese forums they mention that it appears to be functioning normally. well, actually, nobody said they'd been forced to change it...

Re: Imac G5 17" - no powerup (& bulging PS caps)

Toasty and Ran, THX for the quick replies.



it's a 661-3351 - Rev A.



Yup, but NO DIAGNOSTIC LEDs were lit, so power's not even getting to the mobo.



I've had explosive things happen to me when I've connected caps backwards after building a circuit with a hangover!

but there was silence... Nothing... no flames nor smoke.

I also compared the final with a photo I took of the original caps still in place to...

Re: Imac G5 17" - no powerup (& bulging PS caps)

Guys and gals, this is my fist post on this forum after skulking around trying to decide whether it was worth it fixing my 17" A-rev PSU.

I read a lot about fixing iMac 17" (rev A) PSUs on various Japanese boards (I live in Japan) and thought why not give it a go on an old iMac (currently an Objet d'art) that a mate of mine had lying around for a year or two.

I had the "one light only" symptom, after a couple of weeks of intermittent start up failures (no response to power...