iMac (2012) turns off circuit breaker when plugged in
Hello dear iFixit Community,
My iMac 21.5’’ Slim 2012 (I don’t remember exactly which model it is) suddenly made an explosive POP sound, which shut it down and turned off the circuit breaker. There was then a distinct smell in the room, and it’s not possible to put the circuit breaker back on as long as the iMac is plugged in.
I opened it and removed the Power Supply Unit, in order to check if there was a damaged/leaking capacitor. I didn’t notice anything obvious but I am no expert in electronics, and merely follow tutorials from the internet (especially from iFixit!). However, the power plug of the iMac cord looks like it’s been burned by the incident. I blew dust off the computer with compressed air and assembled everything back, which did not resolve the problem.
One thing that might be important: I opened this iMac a few months ago and replaced the HDD with a SSD, which worked very well until now. I didn’t have the specific adhesive strips therefore I fixed my screen as much as I could using double-sided tape, and this let a ~0.5mm space around the screen (the iMac wasn’t perfectly sealed anymore).
I could get a new Power Supply Unit for only 110USD, but I don’t want to buy it if the problem is deeper or if any expensive component has been fried. In such case, I’d better off buying a new iMac because the repair wouldn’t be worth it. But it would be great if I could only replace the PSU.
Do you have any idea of what could’ve happened, or how I could check if this short-circuit didn’t kill any componend?
Thank you very much!
Valentin Udriot
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