We've just experienced the digital changeover on the Sandy Heath transmitter. It involved, apparently, moving BBC channels to a different MUX. Auto re-tuning the Samsung TV and the Sony digibox that feeds the S1 TiVo were completed OK. Both work as expected. But selecting a BBC channel from the TiVo, e.g. using the mini EPG, only works temporarily. The screen reverts to black after ten seconds or so. Might this be a result of a missing TiVo line-up change or should I look elsewhere for the remedy?