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Model A1418 / Late 2012 / 2.7 & 2.9 GHz Core i5 or 3.1 GHz Core i7 Processor

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iMac 21,5" late 2012 lcd backlight not working

Hi,

This iMac has no backlight anymore. the diagnostic leds are all oké. Is this a broken lcd or is this a logic board problem?

Thx for the reply

Contestado! View the answer Yo también tengo este problema

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Using a flashlight can you see the faint image of your desktop icons? You'll need to hold the flashlight at a sharp angle resting on the screen to see.

You might also want to check things using an external monitor as well.

Let us know what you find!

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Yeah, I can see the desktop icons with A flaslight. Will try with an external monitor

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Solución Elegida

Sadly, this implies your logic board needs repair. Either a fuse link or more likely the backlight LED driver burnt.

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I did the test with the external display and this is working fine... So still the fuse or backlight LED driver?

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Without opening and testing things out I'm just guessing here ;-} The good news its' not as bad as it could be!

You'll need to find someone with the needed skills & tools to dig into repairing your logic boards backlight circuit. This is beyond most DIY and you would still need to find the needed parts which can be tough.

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