Just for info:
In the UK we have a number of "off-air" digital TV channels which are free to use (freeview). They are our basic channels on current digital TV's. Old analog TV's required a set top box (analog to digital) in order to view them. Alternatives are "paid for", such as satellite or cable.
Firstly ensure you have the latest software update. Otherwise there is almost certainly nothing that the owner can fix and, as DAVE said, most likely hardware.
Always pop back and let us know the outcome - thanks