Been having intermittent channel problems for a while, probably started last year and would come and go with big periods of being fine. Always the same channels missing, BBC[1/2], CH4 .. But the HD versions were always be fine so never really looked into it.
The disk is a very early sky model with an equally early quad lnb. FoxSat is 27Months old.
Recently took a turn for the worse so I replaced all the f/plugs and had a local company in to check the dish and lnb. They had a good 90% signal on all 4 polarities.
Contacted Humax and they suggested a factory reset. Which has resulted in now loosing all the channels. 11428H has 0 signal. A manual tune picks up some channels.
I'm still suspicious of a 6+ year old LNB but it would seem to point to the box. Got a support call open with Humax so will follow up.
Throwing it out onto the forum in case anyone else has any ideas.