"Having discovered that we had no satellite tv (panic!), I investigated the dish on the wall. The dish looked fine, but the LNB had clearly seen better days. I reckoned that this must be the problem. So off to Screwfix I go. This was very easy to fit. Although my dish has the wrong size arm for the unit to fit on, I used two cable ties (once I had someone inside confirming we had a signal) to fix the LNB to the arm. Very simple, and a LOT cheaper than getting a company in to fix it."