Neo Geo issue

Kordova

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So I'm having an interesting issue with my new Neo Geo MVS-1. It has a 150 multi game cart in it. The machine powers on, and the game select menu operates fine. You can them select a game, have it boot up and even apply credits and begin play in some cases. Then, inevitably, at some point shortly after game play begins, I get green screen and back to attract mode/title screen.

It strikes me as odd because it takes you back to title screen, not game select screen. If the board itself were bad, I would assume you'd end up at game select. Again, if a cp issue were shorting something, I would think it was would see you to game select because it was rebooting the entire board.

All mine is doing is rebooting the game itself, which, in my mind indicates a cart problem or perhaps a momentary power issue. I cleaned the edge connectors on the cart briefly to no avail.

Thoughts?
 
The power is what I was thinking. It struck me as odd because it appears it will stay in title/attack mod indefinitely. It only begins to reboot once you begin actually interfacing with the game.
 
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It looks like turning down the power supply took care of it. It had been working fine until I reached in to turn down the volume. Then started going haywire. Most games are now without problem, as for the ones that still freak out, i.e. KoF 2003, I will assume its the hacked cart itself. Thanks.
 
Mine does this in my 4 slot as well but worked fine in my 1 slot which was in a different cabinet. I may have to try this, thanks.
 
Mine does this in my 4 slot as well but worked fine in my 1 slot which was in a different cabinet. I may have to try this, thanks.

Like I said, it didn't fix all the games. Don't know if the remainder of the problem is a glitch or a power issues.

It only started when I turned down the volume. Perhaps there was excess voltage on the board because of less drive to the amplifier.

Give it a 1/16th of a turn down. I didn't check the actual voltage but I will.
 
This is why they say the multicarts are to be used in a 1 slot and with a stock bios.

Mine actually is a single slot with a stock bios. But, I know you were talking to someone else. I may end of replacing the cart anyway.
 
Open the game

Open the game up. Only a few screws. Make sure the pins are connected on the inside. Several of them....I left off my case because the pins would pull back off when you seat the cartridge. I think many of the cart cases are warped. I just found this prob last night.

I would also double check your 1 player select button to make sure it's not connected wrong. I made a silly mistake of hooking up the wire to the wrong connector. Ground is alone and the power wire lead goes right below with the two paired.

You can actually still use it with the wrong connection, but if it is held down for 5 seconds it will return to the menu. easy thing to try....unplug connection from button, start a game with your red button (first button) and see if it still does the same thing.

Hope one of those helps,

-jot3
 
Opps

Realized you found your problem partially.
I've had strange short issues when one of my ground wires are a bit lose on just one of the buttons / sticks.

One lose ground on a switch could cause weird things.

Hope you found your issue.
 
I still think he should open the game itself

I was trying to figure out why I found graphic glitches and have heard of sound glitches in other forums. I had these problems with a 150 as well, but just kept assuming it could be a power issue or wiring. If other games work fine, then I would blame it on the cart.

If you open the cart, you would see how they designed it. I have a three card stack in mine if I remember correctly. Two of the boards are only holding together with small pins (maybe 16 per each side of the boards. When they were in the case, they were slowly coming apart.

I believe the cart (plastic outer part) is a bit warped and would slightly pull the boards apart inside when you insert the cartridge into the MVS board.

Unless you are under some magical non existent warranty....I would open it and just look.
I literally did this last night and wanted to kick myself for not looking sooner. I actually kept my case off and just kept the bottom part the helps split the boards on the bottom.

It now works perfect. No sound or graphic glitches. Just the annoying fact that they have a bunch of hacks on the list of 150. :)
 
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