Try to DRY BOOT the tablet. Disconnect the keyboard, disconnect the AC Adaptor cord, remove the battery as well as whatever else you have connected to the tablet. Pull the power button like when you turn your tablet On, except don't let the button go, hold it in pulled position for 2 minutes. Then let the button go and plug everything back in and try to turn it on again. Also check if the battery shows any activity on the indicator lights as well as the lights on the front at the bottom of teh tablet show activity when POwer AC Adaptor is connected.