Having moved house, my TiVo has been left idle for a few weeks, got it reconnected, different sky decoder, but still Pace, all is working ok, except I have no audio! TiVo effect noises are working, audio works on old recordings from before the move, but no audio on viewing live TV. Haven't rerun GS, as nothing's changed, video is connected through S video port , tivo is changing channels on STB fine. TV is a basic, unmodified series 1 US unit. Any ideas?