My iMac Screen not coming on
HI guys My iMacs Screen isn't coming on.
LED 1 and 2 come on and so does LED 3 however after about 30 secs it goes off and LED 4 never comes on.
Any Advice on what to do or check?
Thanks
Is this a good question?
HI guys My iMacs Screen isn't coming on.
LED 1 and 2 come on and so does LED 3 however after about 30 secs it goes off and LED 4 never comes on.
Any Advice on what to do or check?
Thanks
Is this a good question?
To double check things see if you get an image using an external display.
But from your symptoms it sounds like the GPU board has failed. From Apples support docs:
Here is the IFIXIT guide you'll need to follow: iMac Intel 21.5" EMC 2389 GPU Card Replacement
And here are your choices for replacement boards:
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