I thought I'd take some time and re-visit the original Nanao MS8-25FAN3 monitor. Nanao chassis are seemingly known for cold solder joints. I went around and tidied up any that I found on the chassis and neckboard.
Plugged it in and:

Yuck! But it works!

Made a few adjustments:

Set up a quick and dirty mirror so I could play my first game on this machine

Observations:- There is some vertical jitter to the image which sounds familiar so I'll go consult various Nanao tech threads. Really, I need to do a cap kit.
- Also, you can "hear" the HV, much like vector "chatter" that decreases/increases with the brightness. I turned off the lights and didn't see any arcing, but I'll have to investigate this more.

- Remote degauss button inside the coin door doesn't work. The cable is plugged into the chassis, so the switch may be shot, like the service button above it.
- There is some "interference" like noise in the image, which also occurred while plugged into the monitor in Pole Position. I tried unplugging the fan, but the interference remained.
Non-Monitor: A spring seems to be missing from the yoke. It tilts up when in resting position. EDIT: Looking at pics, this may be as designed. Still have yet to open it up.