Something tells me that the sky broadcast you are receiving is in PAL format. Our American TVs receive broadcast/programming in NTSC format. This would cause the presence of sound, but no picture. Three things you can do: Go out in town a pay for an Italian TV, which is much more expensive, go to the NEX and get a multi-system TV, or try and ask the sky service for NTSC broadcast format and the proper dish to receive it. The latter of the suggestions is based upon what was said a few comments before mine.