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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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Internal LCD Not Working

I have this 2013 27" i5 iMac that won't display any thing on the internal display. When it boots up the display just stays black no flickering or anything. I was able to get display mirroring turned on and it works fine with an external display as in I can use the external display instead of the internal one. I have checked the display itself and cables by swapping them onto another iMac that I have and they work just fine, however when they are in this iMac it doesn't work. All four of the status LEDS on the motherboard are green, and everything else seems fine. When I power up the iMac with the display disconnected the fan roars the whole time so I know it is detecting something.

Any ideas?? Thanks!

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Have you changed the hard drive?

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have you use a flash light to check if your back light is gone?

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What @alexhus is saying is to shine a flashlight on the internal display at an angle and see if you can discern the desktop.

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@mayer yes sir you are correct

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I have tried that and it makes no difference at all. I can't see anything it's just not getting any signal.

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Sounds like a Dead Display to me.

Brace for impact - the display is multi-hundreds of dollars on eBay, including shipping. I'd recommend DV warehouse for this one.

Do you have the serial number for your mac?

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How can it be the display when I switch it to my other iMac the display works fine? Both of the displays I have work perfectly on my other iMac. That's what I don't understand, I have the ability to test components since I have two iMacs otherwise I would think it was the display as well.

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@macuserman What using an external monitor shows is that the GPU is good and is generating a video signal. So the issue is the signal from the GPU to the internal display.

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@mayer Makes sense to me I'm not sure where the failure is though.

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PLan B would be the video card. Some dead video cards are capable of mirroring to an external but too dead to utilize the 27 inch display, Especially if the Video card is a RAdeon.

https://support.apple.com/en-us/HT203787

Here's a link to the Apple Video Card Recall, perhaps they can get you a free one. :)

Is there a serial number for that iMac in question?

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@alinorne Kevin - This machine (if it has been correctly identified) would not qualify.

@macuserman - Please go here and input the serial number given on the bottom of your stand to correctly identify your exact machine, it could make the difference in a free repair vs a very expensive one, please let us know your results: http://www.everymac.com/ultimate-mac-loo...

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I'll do that and update, but I don't think it is under recall. It is the 2013 27" A1419 iMac with an NVIDIA Graphics card. I can run the serial number when I get home, but I don't think I'm that lucky.

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I can pull the serial number, but I know this is the model. http://www.everymac.com/systems/apple/im...

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