ArcadeVGA and Mame, Monitor Problem...Help !

[smithers]

Hi all,

Hoping someone can help me, as I've posted on Killercabs and no one seems to know the answer.

I have an LS29 candy cabinet, which is only about a year old.
I have installed a pc with Mame and arcadevga and a j-pac.
Got everything working great except for 1 thing.....

Everytime I use the machine, whether on windows or an emulator, the brighness continuosly changes !

Even scrolling up and down a wep page, you can see the background changing colour.

It seems conected with what other colours are on screen at the same time, as in Sonic, the sky is light blue and the floor light green....as soon as you hit a ramp and go skywards, as the sky goes adark blue, maybe because there is no green on the screen to compensate.

My reds can also seem a bit ott, but only on certain games..on sf2 for example dhalsim almost appears bright red, instead of brown.

There are a few other people on the killercabs forum with exactly the same set up getting the same problems as me, but it seems that pcb's run perfectly. so it much be the pc setup.

Could it be something to do with the power supplys or the voltage. I have left my cab power supply in to power the marquee etc..might that cause this ??


Please help me if you have any ideas at all..

Thanks in advance,
Mark