I have 480i CRT that I use for watching legacy VHS recordings of rock concerts not available on a better format.
Recently the picture started to be very unstable on certain white / or just bright scenes. It starts with vertical lines starting to break-up near the top of the screen and goes all the way to the picture starting to jump, This break-up only happens when using the composite or RF inputs. It does not matter if I use one of my SVHS VCRs or one of my DVD recorders. Hooking the same SVHS VCRs or DVD recorders with S-Video or the DVD recorders with component the picture will never break up so I can eliminate the external gear being at fault.
I went to the service-menu and adjusted everything using the AVIA calibration disc. All geometry, convergence and grey scale patterns are adjusted and look good via S-Video or Component hook up but break up with composite or RF inputs.
I suspect the TV ‘comb filter’ since a separated input looks normal. But could this be a different problem that will eventually lead to S-Video and component suffering the problem?
Please don’t tell me to grab another TV off of craiglist or stop using composite – I want to know what may be causing this problem.
Info on TV
Thanks in advance.