Help please from a not very technical newbie.
Equipment Humax PVR9300T with Panasonic TV and DVD.
Last evening from approx 19:00 - 22:00 all BBC channels were lost, with the message "The channel is scrambled or not available" on a black screen initially, but after about 20 secs, an incorrect channel played as below, with the error message still displayed. (The TV itself was not affected.)
BBC1 played Sky News (82)
BBC2 played Challenge (46)
BBC3 played Pick TV (11)
BBC4 played Dave (12)
BBC News 24 played E4+1 (29)
We had set X-ray and New Tricks to record on BBC1 but lost them as Sky News was recorded instead.
We were going to try a retune later but then BBC News at Ten reappeared spontaneously, so we left well alone.
We're quite used to the odd Hummy glitch having had a 9200 before this, but have never come across this problem before and I couldn't find it in FAQs.
Any ideas why and if so, how can we stop it happening again?