"Why is my iPhone working but the screen is black?"에 답변A couple times my iPhone 3G got dead., though it was fully charged. In the phone bost guy said battery need to replace ,but he didn't have one.i went home tried both button simylteniously until silver Apple apears on the screen. Than sign of the power, and it worked. But I think it is something wrong with phone . Just to reboot I tunes solve problem temporary.