Have just picked up a new 64gig wifi iPad 2 which was swapped out by apple as my original unit was damaged. My problem is that I seem to have a faulty screen. Sometimes the screen sometimes has dead spots, keyboard keys are un responsive, swipe to switch on sometimes does not work equally so times the swipe to power down does not work. The problems are mostly in landscape mode and sometimes I can sort it out by reorientation of the screen. Sometimes when using the keyboard I will press a key once and it will register multiple times. Are these known problems?