Clive

Hi All, I've been using a satellite set top box to receive Intelsat, UK TV. Realised the TV has satellite input so connected my dish cable directly into the TV sat input and I can get to the point where I can see all the UK TV channels but every one is black, no picture or sound. I'm assuming there is an extra step in the setup but can't work out what to do. Can anyone advise what I need to do, is it even possible? Or is there an additional app that I can download? Thanks!