This could solve problem
1. Select Menu, Set-Up, Help.
2. Press the Green button on the
remote control.
3. This shows the Advanced
Information screen.
4. Now press the Blue button which will prompt you with a warning box.
5. Now press the Green button if you wish to proceed.
6. The DTR will take around a minute to complete the reformat, and will then automatically restart itself.
Next do a channel rescan.