This a 34cm TV / VCR combo my wife is very fond of

Two lines 1" thick rolling down the screen (separated scan). , maybe
Retrace lines or bands rolling down the screen.

We suspect its a electro in the vertical, but what is the best way just
looking at the PCB which is the vertical section. I think the switch mode
supply is obvious, then theres the tripler and a HOT nearby but what would
be around the Vertical drive section ??