I have been reading through the thread and gaining knowledge on this psu. I think I'm going to replace all the caps. its an imac 24 with the Liteon psu. About three years ago it shut down and began tripping the circuit breaker in the house. I pulled the psu and connected it to the mains power only and tripped the breaker. Last month i tested the transistors and diodes, found them all good. So i ordered a working one on ebay, but tried the psu once more and after all this time, it was working again which was really great, and i canceled my order . it has been working for about a month with light use. Well, last night I got a screen telling me i need to restart, i'm thinking its about to go out of order soon. Would you advise on this?
Your statement about tripping the house breaker makes me suspicious that there's something wrong with that circuit. The supply would blow its internal fuse long before the house breaker would trip.
Recapping is a good idea. I would leave out the Mains caps and just stick to the others.
Just make sure you don't have a motherboard caps problem.
Yeah house is 20A and actually part of that circuit failed completely. The breaker tested good, but a several wall outlets have no power since.
After that I tried another outlet. Seems like the breaker tripped there also, but this is going on three years ago, the PSU was most definate dead.
Toasty, I found the UCC caps, but I'm not finding any MATs. Would you point me to them?
Thank you for the Pin out Sir. Yes the startup section of this psu is burnt. The pin out information you have provided me has now given me the opportunity to test my Logic board and prove that the board is still functional. I have modified an enterprise class power supply to power this logic board. I am typing from this mac logic board retrofit into an ATX Rack Mount Case running Debian 8.0 This system will now take another life with a different function.
P.S. any one need an Early 2009 Imac 24in Screen and Glass front cover. 75bucks for Toasty, 100 bucks for any one else.
Old I know but maybe rwing or someone can help, I want to do the same, I have a 2008 iMac 24 inch with dead power supply, can you explain how I can power the motherboard with a different power supply and the model/characteristics of the enterprise power supply you used ?
Hi,
i have a PA-3241-02a1 liteon power supply from a Imac opened by another tecnician.
i see first led green with AC, and when i press power button 2 led become green for a while then turn off....fan move a bit and see a very little smoke from power.
I'm not particulary expert what i can check ?
1 time power on with all fan moving but no video and no Apple chime sound so i think post doesn't work.
i have replaced power supply with a new one.
try to power up and nothing again.....just 1 green led, 2 led power on for a while , 3 and 4 off.
Can be an issue on logical board?what i have to check on it? some fuse , or other components?
initially this imac has an issue on graphic card (some artefacts when too hot for dust , bad thermoconduttive on cpu, never power down) .
No power can be dued i'm trying to turn on without frontal cover?
Please help.
Thanks in advance
Bye
You said: "initially this imac has an issue on graphic card "
Was the graphic card replaced?
You might have to do that. Especially if it overheated.
These problems started with the graphics card, yes?
T
initially imac have issue with artefacts.
No GPU wasn't replaced
Power make smoke on startup.....so i try to replace it assuming was a power issue.
so only 1 led can be the issue on GPU?
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