I searched for this topic and the only thing that came up was that it was the optical sensor. I have tried covering it up, playing with the phone in the dark but the backlight for the home, menu, back and search buttons will not come on. They worked when I got the phone on tuesday until wednesday night, then they cut out. I just did a factory reset and they are still not working. Does anyone have any suggestions?
If they aren't coming on after a factory reset, I would have to say you probably have a busted backlight. I would suggest taking it into the store as well.
