Marvel vs Capcom 2 no picture no sound

The Drizzzl

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Ok so i got all of my parts, hooked it all up but i get no picture or sound. I can hear the fan running on the mother board and there is a green and a red light inside. Any ideas?
 
Check the jumpers on the naomi board and switch it to vga and try hooking up a computer monitor. That will tell you if it is outputting video. For this bypass the i/o converter for video.
 
Got it to work. The fan on top of the mother board wasnt running. I had to take the top of the mother board casing off and push start it
 
yeah, the CPU fan has an RPM sensor. if it's not spinning, it knows, and shuts the board down. made this mistake some time ago when I got my Zombie Revenge set and I forget to plug the fan back in lol
 
As an aside, check your voltages going into the MB. They should be as close to 3.3 / 5.1 / and 12 as possible. Naomi hardware is very sensitive to voltages above those, and it can damage your hardware.
 
As an aside, check your voltages going into the MB. They should be as close to 3.3 / 5.1 / and 12 as possible. Naomi hardware is very sensitive to voltages above those, and it can damage your hardware.

the Capcom I/O sets the output voltages on its own. I've had 2 MVC2 boardsets where the Capcom I/O had +5 at 5.00 even and the 3.3 was.. 3.3.

I don't know if there's any particular science behind what you adjust your JAMMA power supply to that can maybe put less stress on the I/O converting voltages or whatever.. I just leaned towards it being Japanese engineering and leaving it at that. lol. I typically adjust every power supply in all my games to where they get 5.10V at the board components though, I'm all about it being as efficient as possible. you could benefit from disassembling the Capcom I/O if you have one and cleaning the JAMMA edge connector on it with an eraser. see the PSU link in my signature.

if you're using a regular NAOMI 3.3V power supply with the JVS... then you're talking about something different.

to meter voltages on Sega hardware, the yellow wires are +5, the white wires are ground, the red wires are +12, and the brown wires are 3.3. little ass backwards from the usual colors. test these at the power connector on the NAOMI main board.

EDIT: just kidding on the PSU guide. I have to track down all the pictures again.
 
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