My beloved 25" 4:3 CRT with RGB SCART and s-video has died on me!!
I have found a local electronics repair guy who works on CRTs so hoping he can sort it for me,
If not I need to think about getting an upscalar. The OSSC is the front runner at present.
For now though - keeping my fingers crossed. The guy is very bust right now but he'll text me when he's cleared his backlog.
Oh, hopefully that guy can fix it for you. I prefer to play my retro games on CRT TV's, so I know the feeling.
What a nightmare, I am sure he can fix it, possible capacitor issue I would initially suspect, without looking inside its hard to say.