Too often I lose audio visual and get a "The receiver is not getting a signal or the signal is too weak" message on screen. It affects all channels, and powering up again does not seem to resolve the issue. It is not clear what brings it back, and the outage can be for up to an hour. Yesterday I noticed that a planned programme recording was completed while this was happening. Anyone have any ideas what's going on here? Many thanks. Humax Freesat HDR-1000S linked to a dish serving a new multi-flat building. TV is a SONY Bravia LCD Digital TV.