Rite l start from the beginning:
I have bought a old virtua striker arcade machine which I know the monitor is a medium res 25khz. I'm in the process of turning this into a mame cab.
With regards to my PC I have a ATI radeon 9550 graphics card that is supported with soft15khz programme. I have installed the recommended ATI Catalyst 6.5 programme. I have then installed soft15khz and only installed 25khz as that what my monitor is. I then changed the resolution settings to 600x480 as stated.
Then Using a VGA breakout cable I have connected all the right leads from my monitor to the cable. I.e R.G.B horizontal sync and vertical sync. Turn out the pc and absolutely nothing, just a blank screen. There as been on 1 occasion where I can slight see the desktop but was flickering
Badly. What am I doing wrong?

??