zenith 20X1C38 video noise

[DaveWM]

tuning it to a blank screen (my converter box can do that) I get flashes of dots all across and over the screen, color dots that flash across a blanked out screen. Not a lot.

1st plan is to just run it for a while and see if it get better, maybe humidity (its out in the garage). If that does not do it I will giggle some tubes, but I don't think its that. then I was thinking of pulling the IF tubes on at a time and see if I can isolate it. If that does not do it I guess it will be scope time.

It looks like maybe a IF decoupler cap or a video decoupler breaking down.

guess it could be a load resistor as well.

Pretty sure it does it even with the fine tuning off enough to block the color, so guessing its not in the chroma at all.