Help - I am new to Android. I very stupidly instructed my brand new and perfectly working Apad, to look for upgrade on the SD card, which was empty. Now I cannot start up the Apad. I momentarily get the start screen image, then all I get is a blank screen. The Apad stays on but there is nothing and I can't even turn it off. Connecting it to my PC registers nothing. So my only 'fix' will be via the SD card. Can anybody help or advise?