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Unfortunately OH has never tuned the box in so it can be used with a normal aerial and being clueless and having a dodgy leg there is no way I can do it today. I press all the buttons on sky and they work i.e. tv guide, channel changing etc. There must be some volume because this buzzing gets noisier when I increase the volume but there is no noise from the programmes i.e. no talking, music etc. Scart plug works because when I pull it out the pic disappears and then I push it back in again.