Screen is completely white

My iPhone 3G got wet and I dried it for days in a bag of rice. Eventually it started working again and I managed to have iTunes recognize my iPhone once more. I restored it and now the phone works again. Calls, texts etc. all come in, but the phone now has a bright, white screen. Underneath I can make out the clock and all the symbols, and it recognizes my finger gestures instantly, but the screen remains bright white with gray horizontal lines/flickerings. I opened up my iPhone yesterday and checking the number 1, 2 and 3 cables didn't resolve the issue. Would this be an LCD problem or can someone tell me what to do?