Dont waste your time on a new LCD, it wont help. The 6R8 backlight coil is the problem, try disassembling using the guide on here, then on the logic board look for a round looking chip that has 6R8 on it. Clean it(and the entire logic board where ever you see corrosion) really good with a soft toothbrush, distilled water, and dish soap. Let dry for a few days, I usually wait 3 to make sure all the water is gone. Reassemble, if it still isn't working you'll need a new one - requires soldering but can be replaced.