: iMac 27" a1312 PS problems. Need Service Manuals


SweetDoug
Jan 18th, 2018, 10:28 PM
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Came across a 27" 2011 a1312 iMac, that won't start. Opened it up and poked around, and it appears it needs a PS at first blush.

Does anyone have, or can point me to the Tech Manuals, service manuals on how to test the PS, or any tips.

I don't even know where the LEDs are!

I get power into the PS but only 25.8 volts on the 4th pin on the output, if that helps.

Anyway, any suggestions would be great.

Thanks,

SweetDoug

polywog
Jan 19th, 2018, 04:55 AM
Service manuals are hard to come by (without proper authorization), maybe what you need can be found here though? https://www.ifixit.com/Device/iMac_Intel_27%22

pm-r
Jan 19th, 2018, 05:50 PM
Came across a 27" 2011 a1312 iMac, that won't start.

Sorry, I have and use such an iMac model but cannot find the Service Manual I thought I had for it.
But I don't recall reading about the actual PS specs.

Anyway, maybe you can find some helpful info here:
Apple/Mac/OS X News, Tips and Tech Articles - xlr8yourmac.com (http://www.xlr8yourmac.com)



- Patrick
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SweetDoug
Jan 19th, 2018, 08:38 PM
Yeah, I'd come across this, but it doesn't have what I'm looking for, unfortunately.

Thanks,

SD

SweetDoug
Jan 19th, 2018, 08:39 PM
Yeah, the user manual is available, but not the Service Manual.

Thanks,

SD