I dunno if this has been addressed already, but this started happening much more frequently lately. My iPhone is password protected so when I go to unlock it, the screen's backlight won't turn on. However, the screen itself will be on, because you can see it asking for the password. This resolves once I type in my password. I didn't mind at first, but I went to the movies the other night and went to check what time it was but the screen wouldn't light up...very annoying. Anyone else having this problem or know of a solution to fix it. I can't replicate it as it happens spontaneously and not all the time. It has to be a software issue but I don't want to restore if I don't have it. Btw, I have a non-jailbroken iPhone 3GS running 3.0.