Horizontal Brightness Bands on Monitor?

I've got a very odd quirk in my monitor....it's a sony pvm-2030.

Sometimes it will display bands of horizontal brightness that vary all the way down the screen. They're about 1 cm thick in the vertical direction, and they vary in one or two brightness shades: corret brightness and too much brightness. This creates the contrast and has a sort of flicker effect.

This ONLY happens under two general conditions: 1) screens scroll vertically, and 2) static or horizontally scrolling screens with an abundance of green and/or dark blue.

Any other time it appears not to be present. I'm not sure whether this is indicative of a loose connection somewhere or not. None of the PCBs look damaged in any way. Anyone heard of or experienced a similar problem?

Any help is appreciated, thanx

Try connecting the monitor ground directly to the ground on the board sets jamma edge connect. (just run a seperate wire) This reduces the resistance between the monitor and game board grounds.

Ive had this problem with a few different cabs, it depends a lot on the board, mvs boards are usually OK but some jammas have that corrigated horizontal brightness prob- improving monitor to mobo common grounding seems to fix it. Also improves contrast level and overall stability.

ttooddddyy said:

Try connecting the monitor ground directly to the ground on the board sets jamma edge connect. (just run a seperate wire) This reduces the resistance between the monitor and game board grounds.

Ive had this problem with a few different cabs, it depends a lot on the board, mvs boards are usually OK but some jammas have that corrigated horizontal brightness prob- improving monitor to mobo common grounding seems to fix it. Also improves contrast level and overall stability.

Click to expand...

Thanx for your response...it seems I've got the problem singled out. Except, it's not an arcade monitor. It's and old commercial-grade monitor that can take a 15hz RGB signal...I'm using it with all my consoles. Anything I can do?

AnechoicJinx said:

Thanx for your response...it seems I've got the problem singled out. Except, it's not an arcade monitor. It's and old commercial-grade monitor that can take a 15hz RGB signal...I'm using it with all my consoles. Anything I can do?

Click to expand...

The same thing may apply ?