RGB Help

[Frohl]

I'm looking at putting a 27" monitor into my cabinet.  I happen to have about a dozen Zenith monitors that are meant to be used as averhead video displays for a scoring system in a bowling alley.  I know its 15khz and is just a monitor with no tv decoders or anything.  Problem is that it is made by a company that changes pcb's, wiring and part numbers from the manufacturer (Zenith) so that they are proprietary and you have to buy replacements from them (really expensive).  SO, I have a monitor, I can get video displayed on it from my jamma board (Neo Geo 1 slot...soon to be removed and turned into Mame), but the video isnt in sync and the colours are way off.  I know jamma has composite sync, so I might have to wait until my arcadevga card arrives and feed the monitor separate sync signals but I don't know why the colours are so off.  I'm worried that their colour choices for rgb wires are not the normal ones.  is there a way with a multimeter to tell which leads should actually be red green blue?  and also to tell wich leads are horizontal sync and vert sync?  The colour problem might just be that the board is way out of adjustment and I'll need to play with the cutoffs but not sure.  Any suggestions would be great. Thanks

[grantspain]

i am a tech in a bowling alley,our monitors have an extra board that can be bypassed,post some pics of the chassis and the actual screen shots so we can see whats happening
never believe what these companies say,they talk crap

an easy way to tell which colour goes where is to get a test screen from a jamma board and have a look what colour appears where

by the sounds of things you have all the rgb/ground and sync inputs in the wrong place

[Frohl]

I'll post some pics of the chassis pretty quick.  Unfortunately, I just disassembled my cab today before reading this, so my Neo Geo guts are neatly boxed up so I can get ready to sand and paint my beat to hell cabinet    Anyway, if you work in a bowling alley and have older brunswick stuff, it is a Zenith 27" overhead for an as-90 system.  I have the choice between using an f5 rgb board or the f5AT (thats the one in there, but i can mix and match...i have tons of parts from an alley that shut down).  And yes it has the video decode pcb from the scoring system that I am bypassing.  the monitor that was in my cab was a WG k7000 19" (so tiny in there) and I ran the wires from the jamma harness to test the zenith one...r-r, b-b, g-g, black ground to black and white composite sync to white. I'll post pics right quick and rewire up my jamma on the workbench to try to test it.