Hello
I have an iMac late 2012 27” that has no backlight.
The diagnostic LEDs 1, 2 & 4 are on, but 3 is not.
I can see the graphics on the screen when I shine a flashlight on it.
It works with an external monitor.
A while ago I replaced the hard drive with an ssd and all was fine until the screen fell off a few weeks later due to poor quality tape supplied with upgrade kit.
I replaced the screen and all was fine for a year except occasionally the screen would dim slightly for a second and then go back to normal. It gradually got more frequent until one day there was a green line down the screen and then the next day there was no backlight at all.
I’d consider buying a new screen if I was sure it would fix the problem, but I’m not sure if it’s the screen or the logic board that needs replacing. Does anyone have any experience with these symptoms? I stupidly got rid of the old broken screen, otherwise I could have just used that one for testing. It’s a bit of a pain using it with an external monitor as you can’t see what’s going on at startup - and I occasionally need to boot into Windows.
Thanks in advance.
I have an iMac late 2012 27” that has no backlight.
The diagnostic LEDs 1, 2 & 4 are on, but 3 is not.
I can see the graphics on the screen when I shine a flashlight on it.
It works with an external monitor.
A while ago I replaced the hard drive with an ssd and all was fine until the screen fell off a few weeks later due to poor quality tape supplied with upgrade kit.
I replaced the screen and all was fine for a year except occasionally the screen would dim slightly for a second and then go back to normal. It gradually got more frequent until one day there was a green line down the screen and then the next day there was no backlight at all.
I’d consider buying a new screen if I was sure it would fix the problem, but I’m not sure if it’s the screen or the logic board that needs replacing. Does anyone have any experience with these symptoms? I stupidly got rid of the old broken screen, otherwise I could have just used that one for testing. It’s a bit of a pain using it with an external monitor as you can’t see what’s going on at startup - and I occasionally need to boot into Windows.
Thanks in advance.