Azpen A770 tabletop wont turn on

I have trouble with my unit AZPEN A770 TableTop, when i power on it is written Azpen with the logo and than after 5 minutes it is popping up window with message android is starting but after a few minutes it is restarting and again starting with Azpen logo. i think this is the software trouble problem but i am not sure, so pls can you help me, i tried to reset the unit but without any changes. I am waiting your reply, thanks in advance