Now it is working again (crossed fingers). Anyone need a great TV?
Comments: The ‘proper’ way to reliably repair this chassis would probably be to remove all the solder from each rivlet, scrape the solder mask from the traces in the vicinity, and add bare wires through the rivet hole and to the traces to complete the through-hole connection. Then, fresh solder and flux with a hot iron. One could spend their waking life on one such set! There are probably only a half dozen actual rivlets that are the problem children. However, there is often no visible evidence of the bad connections. Even with the schematic, locating them based on would be difficult and there would be no way of knowing where the next one would crop up.
