I am currently facing the same issue with my Tevii S480 and the DH67BL Board.
Did you manage to solve your problem?
Thanks & regards,
hey bud, i got the same prob... i lost my video board cause when its happens i've reboot like a crazy.. .then the board dont work anymore...
i buy a new one, but i'm afraid lose another one, if u got any clue to what to do.. let me know