We've had our tablets (we have two: his and hers, both are 'TF300T' models) since May of this year. No problems, but husband hasn't turned his on for a couple of months. Now it won't turn on, even when plugged into the charger. He charged up the keypad and now has removed the keypad from the tablet and is charging the tablet separately. Can anyone take a guess as to what the problem is? We're planning to leave it on the charger overnight, but not holding out much hope. Thanks.