Hello and
What version and year? It will help us to help you. If it was made before about Oct 2004 then the TV receiver may be analogue only and only digital TV is broadcast now. Hybrid receivers (that will do DVB(T) ) began to be installed at some point in Oct 2004 onwards. Also note there are no broadcasts above CH60 as Chans 61 - 68 are now for 4G mobile networks.
Your build month/year should be on a plate under the bonnet.
If I remember correctly the module is a plug and play so can be replaced, though I suspect they’re getting rarer given production ceased 15 years ago.
With the PDC put the park sensors on and put your ear close to each one. They should ‘click’. Any not clicking have failed and losing one stops that end from working and the light in the car flashes. Sometimes the module goes as well, but it’s usually the clicky bit.
and now on my fourth Beamer this time a step-up in more ways than one having just bought myself a nice condition if older X5 just getting to grips with some of the features and working out what is working as it should and what needs looking at such as the PDC and Sat Nav/TV screen. But not in any mad rush! 
Never anthropomorphise computers. They hate that.
