try this , from rootwizki or whatever :
plug usb into comp, have it connected to touch pad, already have barrel charger plugged into the wall. unplug the usb from the computer and quickly plug it into the barrel charger. it worked for me, good luck
Unplugged USB from computer and then plugged into the Stock Power adapter thats was already
Plugged into a Power Strip.
6. Saw Home Button start blinking as soon as I plugged it in to the power adaptor.
7. Waited for about 2-3min and then screen cam on with low batter symbol.
8. I let the Touchpad charge for about an hour and checked it and it was booted into android.