QUOTE (Punchbuggy @ Mar 15 2008, 07:58 PM)

OK, I think I've done it. I used a Western Digital tool to write zeroes to the hard disk I pulled out and plugged into my PC. I actually don't think you need to go that far though, but I'm not sure. Regardless, after putting the disk back into the Tevion I did this (from memory):
After first starting the unit up, press Menu twice on the remote to get to the menu which allows you to reset factory settings;
When you see the "language" screen, pull the power plug out of the wall, wait 5-10 seconds and then plug back in;
When the unit has fired back up and you're back at the "language" screen, select English, Australia then <whereever> - I didn't worry about setting channels at this point;
Press the PVR button and 7 (to get to the list of recorded shows) - if any there, delete them JIC;
Press the Menu button while in the recorded show list and the "Erase harddisk" option will appear - press OK - only takes a second.
The big test is to press the Info button to make sure it says ~159Gb remaining (some overhead taken);
Go back and set back up other stuff e.g. channel search, set-up timings for recordings, etc
At least this worked for me, although I won't buy another Tevion PVR again. And, yes, the Tevion does use the Digenius TV OS that the Wintal PVR-10A uses... see www.digenius.de
Good luck.
I tried all manner of things with my MD29401 including deleting all recorded shows and erasing the harddrive and reseting to factory settings. I stopped short of pulling it apart and formatting the disk however. It came back to having 99.7% free space and would record but not play.
You can imagine my dismay when I physically powered it off by unplugging the power cable (behind the entertainment unit

) Powered it on after about 10 seconds to find all the recorded programs back on the list and intact. Whats more they now play ok too and the unit is working fine.
On top of that the reception that was reading C/N 18 sometimes fluctuating to 18.6 or 19 is now much clearer and reading around 21.
My lesson from all this is what I used to preach when I worked in IT, Do a hard power off for 10 seconds (with the power cable NOT the remote) before you waste anytime on clever software resets

Good Luck.