I bought a 64 gig +3g iPad today and I suspect it is doa. When I try and setup by connecting to the PC, it is not being recognised by iTunes 10.1 and it simply won't power up. When I try and charge it using the power adapter, the Apple logo briefly appears (for a few seconds), the screen blanks out and then the logo reappears and so the cycle continues. I've tried to reset, but there's just no life. I have a second iPad that works perfectly with the PC in question, so I therefore suspect it can't be related to the USB port on the PC or the version of iTunes. What could be worng?