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Just to close the loop, this was ultimately resolved with a New Old Stock logic board. Someday I'll completely re-cap the original board, just to see if that fixes the problem. NextStation now running great with an external SCSI CD-ROM and an internal SCSI2SD upgrade.

Was able to rule out the monitor using a very hacky hack to get some signal directly to a separate VGA. I didn't know how to deal with the grayscale, so I just sent it to green -- and you can see the same pattern shown. So its something on the logic board. I guess I'll proceed with ordering some...

Thanks, cross-posted there. There doesn't seem to be nearly as much experience/expertise on Steve Jobs' "other" computers, so I'm casting as wide a net as I can for help!

Picked up a NeXTSTation with matching monitor, keyboard and mouse this weekend -- only $250 complete. Seller reported that it worked last time he used it but that it was showing "diagonal lines" when he tested before the sale. I got it home, checked the logic board and clock battery, then fired...

The connector on the analog board is gone -- solder points cleaned bare. I think that's the female end? The end on the wires is still there, just nothing to plug into!

There's a lot of conflicting advice online about discharging -- everything from "don't do it" to "do it or you'll die." I have a copy of Dead Mac Scrolls, but not Pina's full guide. I went middle-of-the-road and set up my discharging kit, but didn't include the resistor -- since many forums...

Replace the chip shown in this picture. Also see my similar, but worse, situation which was resolved thanks to the above advice from a kind stranger on Facebook:

This was caused by damaged to a chip on the analog board, caused by discharging the CRT to the frame. My discharge cable did not include a resistor, because I read somewhere they wouldn't work. Turns out leaving it out is a bad idea. The damaged chip was a Motorola SN74LS38NDS, which I replaced...

Thanks for responding, I concur that all the caps look good. The video problem looks like an extreme version of this guy's SE issues, except he gets a faded picture, and I get none. I replaced the logic board, to rule out anything on that side, and got the same result. Its got to be something...

I've acquired a plus that would make a happy boot chime, but show no video -- although occasionally the screen would flicker if the case was smacked. Following Dead Mac Scrolls, I re-flowed the solder on J4, and following a tip found elsewhere online, I re-flowed J1 as well. Now it comes up to...