silvertone roundie

[ctc17]

I would unplug the crt socket and the hv reg tube and see how high the voltage goes, then I would disconnect the hv from the crt and measure it in an attempt to verify there isnt something like a tad of air causing overloading.

But thats me, I have no fear of getting shocked or it arcing all over the place.

You changed the 3A3 right? Premium cigar rash?

Its common to fluctuate from 20-24kv, thats common and shouldnt be noticed.

Also, keep in mind how demanding modern content is on an old set. During the ntsc days they had all kinds of tricks to limit contrast and brightness. Subjects never work solid black suits on a bright white background. Thats why old programming looks washed out, that was intentional.
A strong crt+modern programming demands a perfect working chassis.

Good to use your hands, run it for 30 minutes, is the flyback hot? is the focus coil hot? the lin coil? etc

Sometimes just using a set that has been stored for years fixes alot of issues. Maybe its time to just use it gently for awhile and see if it wakes up.