I'm having the same issue. tablet boots up and sometimes actually lets me use my password but then recycles to power up mode.
I did try to restore the factory settings however it would reboot and keep recyling.
i found that if you hold down the power, volume up and home keys it will boot into another menu with options to reset the software back to factory settings.
still same problem... another selection was to boot up by sd card however i can't find a file to load on sd card to have it reload the system and boot the tablet.
please help as i can't afford a new tablet...