Re: Bad tuner?

well, tapping on the neck board to get the picture back indicates to me
you've got a tube going bad, or bad solder joints on the neck board.
considering the amount of high voltage floating around there, i'd
suggest you fix that first.

if your AV jacks have perfect signal, and you're piping RF directly
into the thing..then, yes, it sounds like you have a defective tuner,
you may try tapping the tuner itself and see what happens. my RCA XL100
console has a tuner issue like that. my GE 36" has a tuner that stopped
functioning, it's basically locked between channels 2 and 3 judging
from the noise i'm getting.

quite honestly, i don't see where analog RF tuners are a necessity.
We've already started moving away from that with DVD players. I've in
fact considered "building" basically a box with a medium resolution
video monitor and then getting the hardware to convert baseband
(composite)/S-video and interlaced progressive signals to native RGB.

.