Early this morning my Ipod touch 4g's screen went white. I did not drop it or cause any physical damage, the screen was just white 5 minutes after I had last used it. I could still interact with it and play music and use apps by remembering where I needed to touch, the screen was just white. I then installed the newest update (4.3.3 I think) and the screen started to work again. However after a few minutes while using the timer app the screen started glitching and over a period of about 15 seconds became white again. I just DFU restored it but the screen is still white. I am not quite sure if it is a hardware of software issue but does any one know what I can do?