Thanks 3T39

I was about to contact a repair shop, when I managed to find the
vertical section on the motherboard.

I gave it a clean with a cotton bud, as it was thick with dust. The
tv's over 20 years old.

Anyhow, it seems to be working now...!

It was mentioned above about spraying component cooler on the
components after the TV has started to work which may help in finding a
bad semiconductor.

Out of curiosity, what is this component cooler? Is it something like
WD40? Or something completely different?