Re: Freeview channels disappeared overnight?
Its not possible to tell how good the signal strength or quality of a digital TV signal is by looking at it. Digital signals either work or dont work, with a small margin inbetween where the picture pixelates & breaks down.
There should be a tuning menu on the TV with an option to show signal strength and/or quality for the currently tuned channel. This is the only guide you have. The only problem is now that you have retuned, the TV is now rejecting Mux D as too weak to lock onto.
If you have a manual tuning option on the menu, try putting in UHF channel 55 and see if the TV will give a signal strength indication.
I too use a passive splitter to drive two sets, and if this has worked well up until now, its unlikely to be the cause of your problem.
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