Has anyone any idea what the default password (four figures) is for the 'lock' feature on the Magnavox MRV 810H/05?Long story, bought it cheap because it was a display model in the shop and it didn't come with any manual.I locked a film I recorded yesterday thinking I could just 'unlock' it when I wanted to delete it, like on my other DVR, but it's asking for a password. I've tried all the obvious combinations (0000, 1111, 2222, 1234, etc!) but nothing works. I've tried to find a manual for it on the internet, but no joy (it seems to be only sold in the Czech Rep and Holland), and it's not even mentioned on the Magnavox/Philips website (and manuals for other models don't seem to have this password). I rang the shop and they haven't a clue, but have offered to swap it for a dearer model. Reluctant to leave it back because it's all set up and working beautifully, apart from this!Has any one any idea what the default password is or how I could reset the machine in case someone in the shop changed it?Cheers.