TM800 password

Hi guys got a tm800 hd from a trader that came with a cline, but the guy has password protected it, i therefore cant update the box, update channel list or even put on epgimport. Is there anyways i can get around this, cos i know he will not give me the pass, if i can get the c line from the box somehow then i guess i can update software ans keep default password on it right?

Thanks guys
hnj