This has now happened twice.
On each of the past two evenings when I switched on my FVP-4000T at 7:45pm I only had HD channels. When I rotated through channels only the HD were there and the EPG only showed the HD channels. There were no SD channels.
However, I have a recording set to record the Vuelta between 7 and 8pm on ITV4, an SD channel. Amazingly, when I pressed OK I saw the red "1 recording" symbol, and when I went to recordings, it was recording the programme. But I still could not access ITV4 by rolling through the channels or by typing 24.
The Settings > Signal Strength showed that two tuners were being used, one for the HD multiplex and one for the ITV4 SD multiplex.
I then went to Recordings, selected the programme and chose View Now. I could see the programme. And when I changed channel, all the SD channels were now available.
The recording had worked properly and I could view it from the beginning.
I am very confused ...