Yes I think you are right. I am on the old system but when I press the source button nothing happens. If I press source on the tv itself I get a choice of AV1 Stereo but when I press a channel I go back to mono and the same snowy picture as before. I have changed the batteries in the remote.
Thanks Allan Kelly
No it does not have built in freeview --too old!
ModelI think the model is LW20M21C
There is nothing connected to this TV I watch channels 1 to 5.