Lenovo TAB 2 A10-70.
My battery was also drained after two months of no use and the screen would not show anything.
Plugin in the original cable and pressing Power button did not work for me and neither recharging it for over an hour. Completely dead!
The only procedure that worked for me was to open the tablet by unclipping the back cover and detaching the battery flat cable and reconnecting it back. After that I pluged in the power cord and it started up like a charm!