[TinCanAlley]

Originally Posted by DaveWM

If you can get a decently bright raster, I doubt the CRT is at fault. But you should learn how to use the tester to if you think you got it figured out, by all means check it. those Zenith CRTs of the era were quite good (long lasting).

you should not have to turn up the screen drives very far to get a bright raster (no signal just snow). If you turn them up and get a normal white brightness raster, then switch to service mode and DO NOT see the horz lines (RGB they will be faint but should be there, close together if not on top of each other), then there is something wrong that should be corrected before the jail bars.

Well maybe I wasn't using the CRT tester wrong. It was telling me that I had H-K leakage and need a isolation transformer. It also said my G1s were leaking and I needed to do a rejuvenation. I didn't think this was right, so I opened up the unit and found the following (see pic). So much for quality control.

I've fixed it and am about to try it again.