I have a Vistron 32" TV, a very good picture. I have purchaced a Humax digital freesat box with HD.
The TV shows non HD pictures but the HD chanels will only show for about 30 seconds and then the signal is lost. The scree goes green. The TV is HD ready.
I've tried restarting the Humax and the signal comes back for another 30 seconds only.
Does anyone have any suggestions as to how to allow the TV to keep the HD picture?