I replaced the LED Driver Board on my iMac 27 mid 2010
Il Mio Problema
The backlight turned itself off every 5 seconds when the brightness was above level 3. (16 is full brightness). Needless to say I got fed by all the squinting I did at my screen just to see what was going on.
I sent my iMac to 2 different repair shops, but unfortunately without getting it fixed (amateurs)
I then searched around the web and stumbled upon IFIXIT and the repair guides.
It was obvious to me that the LED Driver Board had to be changed.
La Mia Riparazione
I skipped steps 7 to 9 because I managed to replace the LED Driver Board without removing the LCD screen completely. I placed a small cardboard box upright between the screen and the outer case while repairing the machine, but I had to be careful because the screen was still connected to the logic board among other things, with rather short cables.
The repair was a success and I'm very happy I did it.
Il Mio Consiglio
You can skip steps 7 to 9 if you are careful.
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