I was paying £40 month for SKY. Decided it was too much for the amount I watched. Rang to cancel subscription and ended up getting 50% knocked off. I never plug my box into phone line and have had no box problems in over five years. I did get picture and sound breaking up. Engineer costs £60 and they swapped box over. No good. Again got engineer out (free this time) and they suggested it was trees over in neighbours garden blocking signal. Chopped trees down. No good. Next engineer (free again) said it was to do with microwave signals from local train line signals (1 mile away!!) causing interference. Bollox I thought.
Aerial people came out and fitted new dish to side of house as they said it couldnt be fitted to chimney. Again, bollox.
No change. Another engineer came out and fitted the new dish to chimney.
Still rubbish.
In the end, I bought a new LNB off internet for £7.50. Still no good.
The only thing left was to fit good quality cabling in place of original stuff. £12. Picture is perfect as the old stuff had a connection between two pieces and had filled with moisture. This wasn't even checked by the so-called engineers.
I now have a perfect picture and can again spend all my time watching adverts.
So, check cable/LNB etc before spending loads on anything else.
Absolute rip off !