Connecting Monitor to MVS

Hi, sorry for my newbness, but I love playing Neo Geo, and just started to work on one once I bought a broked out dedicated 4 slot from an operator in Louisville.

I had to get rid of the 4 slot board cause it looked like someone took a hammer to it, but the operator threw in a MV-1C he had lying around, and I'm pretty certain it works.

I'm having a little issue with the monitor though.

I bought a new Power Supply from Happ, and wired up the MVS harness to the MV-1C.

WHen I turn the machine on, I get sound, but no video. Do I have this hooked up wrong, or is hooking up a 4 slot harness to a 1 slot a no go?

I'm a idiot.

The monitor is not powered by the power supply. It gets power from the isolation transformer (unless it's a newer monitor). What do you have hooked to the monitor right now? The power input for it is usually 2 wires (maybe 3). Can you see the neck of the monitor glowing an orange color? Do you hear any noise from it when power is turned on? One word of warning; be VERY CAREFUL when working near the monitor.

Thanks for your help. It looks like there is 2 wires, (black and white) going from the isolation transformer to the monitor. There are a few molex connectors that are not hooked up however that are also attached to the transformer. THe power supply I purchased from Happ only had 2 molex connectors, and I matched them up correctly I believe.

There is no orange glow from the neck of the monitor, and it is dated sept 1990.

It does sound like it's trying to turn on when I first turn the power supply on, but that could be the speakers. Sorry, I'm not describing it any better. Would you like me to upload some pictures?

Yes. Pictures are always helpful with technical advice. If there's a molex connector between the monitor and the isolation transformer, be sure that it is fully connected (make sure that it hasn't wiggled out) My monitor is self powered, so I don't have to deal with all that nonsence, but you might want to check your power wiring with this diagram from bob roberts http://homearcade.org/BBBB/buildit.html Your setup should look something like the hand made diagram. As I said before... check all connections to make sure they're getting proper contact, and don't touch the monitor components unless you are wearing proper protection, and/or know what you're doing (one touch in the wrong place can literally kill you).

Have a look around the monitor pcb, there may just be a fuse blown if your lucky. Dont go messing with the monitor if your not sure about the safety issues.

Remember that one side of a blown fuse may be at +B or rectified mains potential (depending on the monitor type) for a while after the monitor is switched off.
Give it a while to self discharge.

Im not talking about CRT charge here, thats a different issue, it seems the horizontal output stage is not running in this case so the CRT will not charge- but assume nothing if you are not sure. Long time dead