OK...

So disconnected battery and reconnected... still the same.

Pulled plugs on TV module... still the same.

Pulled fuses 7, 72 and 73.

Still the same.

Had a mess about with the screen etc and managed to get sound but still no picture... just the juddering lines.

There was a lot of white powder in the battery compartment, like corrosion etc...

Vacuumed it all up, still the same.

Any ideas??