I recently had a cracked screen on my 2006 MacBook. Since I'm out of warranty I decided to try and replace it myself. I swapped out the LCD with a brand new one and now my screen is dim. I thought that maybe the inverter board might be bad, and so swapped that out too, but there is no difference. The screen is very dim (almost completely black), but i can see that it's working. What else can I do about the backlight? Also, if I hook up the MacBook to a projector it works. So I'm guessing that it's not an issue with the logic board. Any ideas?