Each time i install my channels it fails to install at least 10 program channels like itv1, 2,3 channel 4,c4 +1 more 4 i can find and manually install them but then about 20 minutes later the picture will start to lose signal then the picture will stop but i can still hear the program and a note will appear at the top of screen " this channel is not tuned in " then the rest of the channels will also stop working in the same manner I am at a loss as i can't locate my troubleshooter book. I hope it is something simple.
Hope you can help MR P. SPELLMAN

Televison & Video - Hannspree - SD02201100