As of early this evening all of my Freeview HD channels have disappeared from my Youview box. I was watching BBC One (Scotland) HD when it just went blank, and then flicking through the channels noticed that the others like BBC Two HD, Channel 4 HD were also blank but the standard BBC One, Two, etc. was working.
I retuned my box and now all HD channels are missing from the guide list including the standard 1-5 HD channels , BBC Scotland HD, BBC News HD, even QVC HD etc.
I wondered if maybe the HD channel frequency had changed or been updated and my aeriel wasn't picking them up but on plugging the aeriel directly into the TV, I am able to get all those channels on my TV's built in Freeview with a good signal.
Any ideas why the BT Youview box wouldn't be picking them up all of a sudden when my TV can still get them from the aeriel?
I've has the same problem for a few days (weeks?). I am sure it must be the Box because if I connect the TV (Panasonic circa 2010) to the aerial directly all the channels I expect to be available are, and are of excellent quality.
However not only does the Box not output the HD channels at all, in addition reception of quite a few of the other channels is very poor as well. (I'm using an HDMI cable to connect the Box to the TV.)
Interestingly, if I feed the signal to the TV's aerial using the Box's "Aerial Out" reception is fine on all channels including HD - provided the Box is on or in stand by. Using this method of signal feed, if the Box has no power supply then the TV doesn't get any HD signal but all the non HD channels are still fine.
I know this doesn't help you - but it might serve as extra info to the geniuses on here who actually do know their stuff!
Thanks for the replies everyone. I actually re-tuned the box just now and the channels are back - I counted and 13 HD channels in total and checked a few signal strengths which are in the 80%s.
So seems like there has been a fault somewhere but it's working now.