I am having trouble with the Guide button. Instead of scrolling up and down a page at a time to see what programme is on, it has started reverting straight back to the programme I was watching and I have to see what is on other programmes by scrolling one programme at a time while I have a programme on the screen. Hope this makes sense! So in short there is something wrong with the Guide facility.
Is there some dirt under or around the button? Carefully go round the edge with a needle or such like and give it a good blow. Sounds as though it's not connecting to whatever it should.
There will be a technical term for this but I have no idea what it is !