CGA monitor, Radeon HD 4550 - scrambled video image Neiman 23"

[strith]

Hey guys,
I need major help.

I started a mame cabinet 7 years ago, had it up and running 7 years ago. I moved to Los Angeles after college and left it at my parents house for 6 years. I finally picked it up a month ago and brought it to Los Angeles.

I finished up what I had left on the project, painting, the marquee and finally mounting the monitor.

YAY! but it's been 7 years and I wanted to upgrade the machine.

I installed a new motherboard, which made my old ArcadeVGA obsolete. I bought a new one.

But it didn't work. I can't get any image on my monitor. I sent it back to Andy and turns out the ArcadeVGA is working fine.

In the mean time, I borrowed a Geforce Quadro 1440 and with soft15khz, the machine was up and running again. So, I decided to f*** it up again.

I wanted to run Street Fighter IV but the Geforce is too weak to run it. I bought a XFX Radeon HD 4550.

When I connect the video card and the monitor the image is so scrambled. I can't do anything, screwing with the knobs doesn't fix anything.

I bought a EDID, I'm waiting for it to arrive.

I received another ArcadeVGA from Andy. I tried it again, with no luck.

I really want the Radeon card to work now.

Asus a8n-sli deluxe
AMD 2.2
4GB RAM
XFX Radeon HD 4550

I'll post a picture of the scrambled video tomorrow.
I'm open to suggestions.

Also, the video is scrambled from the boot screen to windows. I can't get any clear video image.

[strith]

The chassis is Neiman.
The monitor is  Samsung 23.5"

The chassis can run VGA and CGA. It has jumpers that can be switched.