I am an Apple enthusiast and former employee. I now work repairing liquid spills, physical damage and doing component level repair to all Apple Products.
I have only recently started posting on ifixit, but hope to offer helpful insight.
I currently own an iMac, Macbook Pro, iPhone 4, iPad and Apple TV 2. I also have a strong background fixing software related issues and I'm hoping to shed the light on the much dreaded system folder.
Feel free to email me any questions at aarons.josh@gmail.com
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just wanted to point out that this in fact isn't the LED driver. The led driver exists on the left side of the logic board, and I can prove it thru the logic board schematic. The LED Driver Board you are describing is merely a dc-to-dc board that combines the voltages from the LED driver and the LVDS, allowing the lcd to see one voltage. This allows the rom to communicate and accept the display. Ask anyone who bought the wrong lcd for one of these machine, this is what causes the black screen.