What I mean is if it had been water damaged at all no amount of flashing and changing components would resolve White screen of death, but if it hasn't been water damaged and he tried changing the ribbon and the membrane and he still has flashing screen its the LCD. I have such an Lcd every time I put into W850i it flashes, take it out and put in a good one phone works fine. Kept the dud one hoping drying it on the radiator would make it work.