Apple order number MC007LL/A / 27" 2560x1440 pixel display

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Possible Power Supply issue?

Hello everyone. Long time lurker, first time question asker. This community has been great to me over the years. I mostly replace iPhone screens and other easily addressed issues on iPhone for family and close friends of family. So this community has been very helpful with some of those things.

I recently was given a 27in Cinema Display from a customer of mine (from my actual job). He was about to throw it out because "it's just a black screen". I told him I'd take it off his hands. I was originally thinking it was just the back light that may be broken. However, after getting it home it seems like a possibly power supply issue. When the monitor is plugged into a power outlet it won't even power up a Macbook through the Magsafe cable. This is my first Apple display and it doesn't have a power button so I assume it just powers on when plugged in or when a device is connected to it?

For those of you out there that have repaired these, is the power supply a likely culprit? I'm getting 120v on the cable so that doesn't seem like an issue. I've read in a few places those can go bad.

Also, Macbook does not recognize a display connected. Thus another piece of evidence leading me to think the dang thing isn't even powering on.

Answered! View the answer I have this problem too

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Look on the bottom of the stand to verify that it's an A1316

Looks like China is clearing this inventory out at cheap prices. Here's a brand new one at a great price.

250W Power Supply 614-0487 PA-3251-3A For iMac 27" A1316 LED Cinema Display

At that price, I'm getting one for stock.

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Definitely an A1316. Sounds like you concur it's most likely a power supply issue?


Well when said that it wouldn't power up, that was a major clue ;-) Also, if the part doesn't work you can relist on eBay after they run out in China for double to triple your cost. Not a bad ROI.


haha. Well, I've been reading places that the AIO cable can cause power issues and is a common failure on this thing. I'll be ordering a board momentarily. Thanks!


Doesn't sound like a bad idea!


Please leave me one ;-)


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Did you eventually repair the unit and was it the power supply? I have the exact same model with the same fault.

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Jared Guthrie will be eternally grateful.
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