Re: iMac 20" (white) PSU Runs, Then Shuts Down? P/N 614-0363

As an aside: I did search through the many iMac PSU threads here before posting but I was unable to find any actionable advice related to the symptoms this PSU has.

I have an iMac (white) 20" // 4,1 generation.

Lately it only runs for a couple minutes before powering off. Just like the power has been cut. After which it won't turn back on again unless left alone for a good few hours.

I removed the power supply and took it into work. We do basic electronic repair here. But I'm no electronics engineer, more a dabbler ... good with an iron, but not so hot on fault finding ...

With a little help, I've determined that it is the PSU that is faulty. Under load here (on our test rig) it runs for a couple minutes and...