Menu>Set-up>Help, Green Button (gives Advanced Information Menu) Red Button (Factory Defaults).
This will format the hard drive (losing all recordings etc) as well as resetting the full system and may take some time to complete as the software updates must then be loaded. Hope this helps.
DBR
October 2011
I can answer this question...
How do i reset to Facory Settings Thomson DT16300-16?
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix dtt receivers.