Re: imac g5 1.6ghz 17" power supply

After reading these posts, I've managed to get two celetronix psu's running. I want to thank and give all credit to those who figured out this problem, especially youfo and Toasty. I wish I understood how you analyzed this. But here's what I did with your information, I'll start with the second unit I came across.

The second (psu#2) came from a 20" G5 I bought that also needed a the motherboard recapped. After recapping the motherboard I still couldn't get the computer running because of the bad psu. I had another 20"...

I have an iMac G5 ALS 20" AcBel PSU I'm trying to repair. When I first got this computer it would run for a while and then shut down without warning. The computer's motherboard caps looked good and I tried the PSU in a different computer and it did the same thing. So I opened up the PSU and found one bad cap. I went and changed all the cold side caps, but when I put it back it would not power up at all. So I opened up the PSU again and changed out transistor Q1, it tested bad. I put the PSU back in the computer and it started right up. I went to shut it down and when I did LED #2 on the motherboard...

Re: Help Please with recapped Acbell in Imac G5

OK I've learked in here long enough. I'd like to thank you guys. I've been recapping motherboards for six months. Last month I ran across my first bad power supply, it was a celetronix. I checked another 20" I had fixed up for my wife also had a celetronix. I took both apart and I started using the good unit to get an idea of what the voltages should be at certain spots on the board. And then the good one died, damn. I don't know what I did but I killed it.
After reading this forum, I got the impression I would be unable...