I am looking to get a new screen put in the remote head of a uhf GME TX3400 as it"s not showing anything. the uhf works fine just cannot see what channel its on. I have had a good look around locally but no one seems to "fix" this sort of thing anymore. The tx3400 is a discontinued model too. and no-one seems to know if i can put a new model remote head on what i"ve got.