my acer tablet cracked a while ago and it was fine. yesterday i was using it and it was fine. today I pressed the power button on the side and it was a white screen with black blobs coming from the middle edge of the tablet opposite to the volume buttons. if i click the power button it turns black. if i press again it reverts to the white screen.yesterday it was at 1% today i put it to charge and turn it off and still nothing. i cannot factory reset because i cannot access the screen lock icon. plz help