Issues on an RCA KCS-47 C

[Kamakiri]

This is the project I've spent the last six weeks on. Ugh.

This set has had a TON of work done to it at some point in time. I'd say about half the capacitors in the set were Sangamos, the power transformer had definitely been replaced as well. Someone did some sloppy work with the line filter arrangement, which I cleaned up. I did the usual complete re-cap of the set, good tubes, etc. Only thing that I noticed was one cap value that was way off, someone replaced one of the vertical .047 @ 1 kV with a .005 @ 1.6 KV , so I replaced with the correct value, thinking that the last time this set worked, it had some wildly keystoned picture.

The one thing I did have to do was short the power switch with a soldered jumper, as it turns out, the switch was shot.

Anyway, bringing us up to today. Powered it up for the first time on a variac. At about 85V or thereabouts, tube filaments all lit fine, no smell, no "earth shattering kaboom" (lol). I couldn't her the horizontal oscillator running, either....but there was a buzz in the audio. After a few minutes I goosed it up to full power to see where we're at.

Although there was no static in the sound, I could vary the buzz in loudness with the volume control. No raster, and a minute later, spotted a faint blue flash from the HV cage. Powered it down immediately. Figured that if there's some arcing going on, I better see what's happening.

I removed the cover on the HV cage, and powered it up once more. It appears that there's some arcing going on UNDER the chassis, in the flyback area. I didn't remove the chassis again this evening.

Before power up, I checked all of my connections, all of my solder joints, as well as my capacitor placement against the schematic. I've heard that these sets are absolutely horrible for reliability, but I'm curious what those who are more experienced than I am (which is most of you) have to add here.

Um....help?