The Program Guide on my DTR6300 gradually disappeared and now is completely devoid of any programs.

I got a message from TUTV saying that they were aware of some customers having such a problem and to switch the box off at the mains and then back on to see if it resolved the matter. Their engineers were investigating.

Presumably still investigating.

So you've not been receiving the EPG updates?

If, like the DHD4000, your box uses 4TV for its EPG data, maybe you have lost Mux D and can no longer receive channel 300.

Can you still get Virgin 1 and Film4 (among others)?

It's different on the the DTI6300. EPG and series link data is transmitted on MUX A daily between about 11:30 and 11:45 AM

OK then, the same applies to the possibility of missing Mux A, in which case 'five' will be absent.

1130-1145 in the morning always thought it overnight best leave it switched on tomorrow then - not noticed any missing channels - problem seemed to arise with a new channel arriving last week.