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Few more questions- putting PC in cab (monitor, power supply, etc)

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johnnybleu:
Ok, sorry for all the questions, but I've been digging, and searching for days and I'm still not sure about some things.

Basically, I have a working Dynamo HS5 cab, with a Lethal Enforcers conversion inside. My aim is to just dump my PC in there and have a decent Mame cab. At this point, I have the PC all set up, configured, and ready to go, and my control panel is all wired up and working. The next step would be to get the PC in the cab, and hook it up to the monitor, and this is where I have a few questions.

1- I'm going with a VGA cable hack, and Soft-15KHz. I have my cable hacked and mapped out, but don't know what wires should go where on the monitor board- they're not labeled. The RGB wires are fairly obvious, but then there's two more wires on a separate connector- I assume Ground, and H/V Sync. Is there a way to find out which is which? The monitor is a Zenith, and the two wires in question are white, and white with a black stripe.

2- My second question is; can I power the arcade monitor (and marquee light) with my PC's power supply, or power my PC with the arcade's power supply? The simple reason is that I'd like to have one switch that does everything, and one plug to power the whole cab. I know the easy way around this is with a Smartstrip... I mean, if it requires clever (and dangerous) rewiring of the cab and monitor, I'll just go with a smartstrip, but if it's just a matter of plugging a harness into my PC's power supply, that'd be the way for me.

3- Will the monitor even power up without the game's PCB inside? Right now, I just unplugged all the harnesses I could find, and pulled out the board. I assume the monitor gets it's juice from the power supply, and doesn't need the game board to work? The plan is to put my PC where the game board used to sit.

Thanks a million! This project would be simply impossible without all the info I got from this site!

HaRuMaN:
1) don't know
2) No
3) Yes

fa001:
1) Check out Ultimarc's site, http://www.ultimarc.com/monfaq.html#monitorcable . They have information on the breakout of the VGA cable.  Also since Lethal Enforcers is JAMMA you can check the wiring at the board connector. Pin P is video sync and Pin 14 is video ground. Model number of the monitor would be useful to find the pinout of it.

2) This one has been covered a lot. Basically you probably need an isolation transformer for the monitor and 115v for the PC supply.

3) Yes, but you might not be able to see anything without an image source.

johnnybleu:
I never thought of tracing the wires back to the Jamma harness..... So yeah, the one with the black stripe is V ground, and the solid white one is sync. Now that's figured out.

Ya know, I think I'm gonna skip the power supply thing.... There is an iso transformer in the cab and all that, but it just seems like it would be too much work. I'll just figure out a way to turn on both supplies with one switch, or something. Even if I have to power on the cab with two switches, it wouldn't be the end of the world.  :-\

Thanks for the help!

CheffoJeffo:
The monitor does not get power from the switching power supply -- that provides +5VDC, +12VDC and -5VDC to the game board and possibly to the lights/counter (if any) on the coin door.

The monitor runs on AC power and may connect to the AC main at the power supply as it is a convenient place to do so. Depending on the monitor, it may need to be run through an isolation transformer (if so, it is probably already in the cab).

EDIT: You may well kill the existing power supply if you run it without a board.

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