So the tablet turns on, and you can get into the factory reset menu, but it doesn't boot into the operating system?
The reset button is indicated on pages 5 and 6 of the manual :
http://static.bhphotovideo.com/lit_files/91922.pdf
If you've managed to do a hard reset using the power+volume buttons and that still didn't fix the problem I'd say you have a faulty tablet.