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Model A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5 or 2.8 GHz Core i7 Processor

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Black but backlit screen 2011 iMac

Hi.

I have a mid 2011 21.5” iMac. It will turn on but there is no image displayed on the screen (it is blank but backlight is working) And via the Mini display port I am able to view the iMac screen on an external monitor. I have checked everything inside and all 4 diagnostics lights light up so everything should be working.

Any ideas to do what’s wrong? Anything helps.

Cheers

Update (02/16/2020)

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Update (02/16/2020)

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@oldturkey03

Answer this question I have this problem too

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[image|2006125][image|2006126][image|2006127] @oldturkey03

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@quinn218 sounds like a failed display. Your backlight can still work even so the LCD driver board may have failed and thus does not display the actual video data. Double check your connector and carefully inspect the cable. You do want to post some good pictures of those parts with your question. That way we can see what you see. Adding images to an existing question

iMac Intel 21.5" EMC 2428 Display Replacement

iMac Intel 21.5" EMC 2428 Display Image

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iMac Intel 21.5" EMC 2428 Display Replacement

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Moderate

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30 minutes - 1 hour
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Adding images to an existing question

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Very easy

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2 - 5 minutes

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Hi. It can’t be the LCD as I have 3 different lcds for this iMac which I know are working. Yet it still doesn’t work. I have attended some photos.

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@quinn218 well you did not mention that you have other LCD screens and that you know that those are working and that you already tried those on your iMac. In that case we could have saved some time and would have let you know that you will have to check your connector and components around this. Since it "can’t be the LCD" the fault will be on your logic board. you need pictures of that connector, components etc. to have someone take a look at it.

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@quinn218 help us clarify a few things. Has it worked before? What serial number is your iMac? Why would you have 3 LCD panels for it? What are the exact numbers on those LCD screen?

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Quinn will be eternally grateful.
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