I had the same problem, and using the reset button (with a handy paperclip) twice worked. I'm stuffed if I know what on earth could be wrong that resetting twice does something that resetting once doesn't, but hey whatever works...
Big black mark for android\acer...
Sent from my A500 using Android Tablet Forum
Big black mark for android\acer...
Sent from my A500 using Android Tablet Forum