Overheating and Display Issues (Backlight Inverter?)

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iMac Intel 27" EMC 2639

Model A1419 / Late 2013 / 3.2 & 3.4 GHz Core i5 or 3.5 GHz Core i7 Processor, ID iMac14,2

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Ollie @ofj

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发帖于: 2020年6月27日

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Overheating and Display Issues (Backlight Inverter?)

I have been having issues with lines down the display of the screen of my iMac. I belive it could be to do with the backlight inverter as the lines are in even intervals and it doesn’t look like a standard LCD problem. The device also gets very hot when running with no windows open and the heat is centred at the top left of the back if the mac (where the backlight inverter is located).

I opened it up and there seems to be some heat damage to the inverter (shown in the image)

Is replacing this component likely to sovle the problem?

Any second opinion would be much apperciated as I am not much of a mac expert!

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Dan @danj 声誉积分: 479.4千 Self employed contract worker 35 329 971 · Answer 1 · 2020-06-27T12:45:53-07:00

Dan @danj

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I’m sorry to tell you the backlight floods the full display with light and won’t offer a lines going down the display as you described. That would be a GPU video RAM issue.

Your Back light inverter board is not from the Late 2013 model or even the 2012. I suspect you in fact have either a 2010 or 2011 iMac!

In any case yours look just fine! The coating you see is to protect the solder joints. The capacitors all look good as well as the MOSFETs.

So lets get clarity on which system you really have. Locate the S/N on the bottom of your systems foot and plug it into here EveryMac - Lookup Let us know what you have. Once we know we can get a better idea what’s needed to get you going.

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iMac Intel 27" EMC 2639

Overheating and Display Issues (Backlight Inverter?)

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