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Hi. So I have a 2011 21.5” iMac. It works perfectly fine except the screen won’t light up but if I connect the iMac to my TV I can see on the TV. So what would be causing my screen not to work? The screen itself is not faulty as I have 3 other lcds which I have tested and they all work. Would this be the digitiser? What would be causing it not to show up?
Ps. All the ports on the logic board are fine so it’s not that.
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Take a flashlight and set it on the screen at a sharp angle can you see the faint image of your desktop and its icons?
If you can that points to the backlight. If you don’t then the LCD its self has a problem.
To fix the backlight will require a new LED driver board, Apple P/N 661-5976 and here’s the guide: iMac Intel 21.5インチ EMC 2428 LEDドライバーボードの交換 as long as the cables are not damaged.
A bad LCD will need either new cables or a new display
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@danj thanks for the info. The link you gave me didn’t work. Could you please advise me one that does? Cheers
Double checked both links work!
Thank you heaps for the information! I shined a torch at the screen and sure enough saw the logos. Just ordered a new LED Driver board. Thank you!
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iMac's doesn't have a touch screen which was a 'digitizer' is used for to identify where your finger or stylus is located on the screen.
Your display does have a backlight to light up the LCD from behind so you can see the screens image.
DanJ さんによる
Okay. So you think it would be the LCD backlight preventing the screen from lighting up? Are there any other things that could cause the problem? Anything helps. Cheers @danj
Quinn さんによる