Buzzing sound from MVS

MVS 1 slot version and Supergun MAK Strike.

Connected to my 22" CRT TV via RGB Scart cable.

There is a buzzing sound especially on whiter screens. Quite annoying. My PC Engine does it too.

I rule out the TV because I use my Megadrive and SNES both connected to SCART with RGB cables and they have no problems.

I thought it might be my RGB SCART cable as it was a shitty cheap quality one I had lying around but I bought a brand new one which is gold plated and it did not improve.

The volume on the MVS motherboard is cranked up to full.

Side question: It is considered an RGB SCART cable if all the pins are present right ? I mean the picture is perfect and so is the audio aside from the buzzing sound.

I believe this has been discussed in the tech support forum before. If I recall there really isn't anything you can do, it boils down to the TV. Are you able to test on any other TV hardware?
I suppose you could also adjust the volume slider in conjunction with the CRT.

Edit* here is a thread.
http://www.neo-geo.com/forums/showt...icularly-clear-picture&highlight=buzz+from+tv

The volume slider is actually a dial which I have set to full.

I'm not going to take it downstairs and connect it to my main TV as its a bit of a hassle and the wife won't be too pleased but I do have a Commodore 1084S RGB monitor in my man cave. I'll need to buy one of those 1084S to RGB Scart adapter things.