What causes Sony TV intermittent black screens circa 1993?

the CRT is weak the video mute circuit is muting the video is why the set goes black.
you may be able to turn up the screen control a little and solve your trouble or find a tv shop with a crt machine and have them lightly clean the crt to raise the emission of the crt
also this tv is old and past it's prime so sooner or later the tube will go out
Steve Leamy

steve leamy
June 2007