You can check signal levels quickly by holding down the Info button for up to 10 seconds when tuned to a digital channel. This should bring up a display with signal strength and error rate indicators. What does it show?
Make sure the unit is set to "Home Use" in plug and play.
Select UK as Country setting.
Select "Air" (not "Cable")
Select "Digital & Analogue" or just "Digital"
Tried many times to tune in using Plug & Play, only get 6-7 digital channels, Channel 4 & 5 lousy reception,old TV using same antenna got loads, including all terrestrial perfect. Have chosen correct highlighted options, whats going on?