Luckily, I was able to pinpoint and repair the replica network. A little paint will hide the repair.
Note to self - do some basic tests before installing these!
Replacing the boost filter cap got the voltage up to the correct level. I often read about others able to run sets on original electrolytic caps, but I never have any luck.
Picture and sound are pretty good now. This original very weak 21EAP4, has those telltale bright white areas on faces.