I recently bought a working arcade cabinet with a 25" monitor and a 1 slot MVS. It appears to be a conversion. The monitor is marked Zenith.
I noticed that after warming up, I get weird white noise on black backgrounds. Its not too bad but Its a bit of an annoyance.
I thought it was some kind of interference from the marquee light, but it uses incandescent bulbs.
This problem is accompanied by a soft buzzing sound emanating from the back of the monitor. None of the caps are obviously bulged or leaking, and I checked for sparks on the flyback.
Could this be fixed by something as simple as adding a ferrite to the RGB input, or does this seem more like a problem with the monitor?
Thanks in advance.