This should do it..... Hold down power sw for 8 secs. Power on.
Then press buttons in this sequence....
1) Left arrow
2) Right arrow
3) Yellow
4) Blue
5) Menu (brings you into the menu screen),
Then...
6) Select Technical info
7) Press OK & OK again.
All the above must done very quickly otherwise the "reset" option will not appear!
This brings you to the Info window. At the bottom you should have a coloured bar or two. Underneath the red displayed bar you'll see text ..... "reset defaults"
8) Press the RED button.
You'll be back to the set-up page once pressed so you'll have to do another tuner channel scan.