4-Slot MVS Not Detecting Games - Goes to BIOS

alby13 · Jun 29, 2016

I was testing 4-slot MVS boards for a friend when I came across a board that would not read a game. It would not recognize that a game was inserted. It would go straight to the BIOS options. I carefully tested all 4 slots to see if it was an isolated problem but none worked. What would one check when this type of problem occurs?

ChuChu Flamingo · Jun 29, 2016

You mean crosshatch?

Have you tried cleaning the cartridge connector and game?

mainman · Jul 4, 2016

Very common fault. The cause is corroded traces underneath the battery on the bottom board.

alby13 · Jul 5, 2016

ChuChu Flamingo said:
You mean crosshatch?

Have you tried cleaning the cartridge connector and game?

that's right, it goes to crosshatch. i think cleaning the connector and game were not the issue because they were pretty clean and all four slots were in decent shape. the game worked fine in other motherboards.

alby13 · Jul 5, 2016

mainman said:
Very common fault. The cause is corroded traces underneath the battery on the bottom board.

makes sense. so the traces get corroded because the battery leaks and causes this issue?

BIG BEAR · Jul 5, 2016

Yes. All of those original old batteries should be removed ASAP.
BB

alby13 said:
makes sense. so the traces get corroded because the battery leaks and causes this issue?

SpamYouToDeath · Jul 6, 2016

alby13 said:
makes sense. so the traces get corroded because the battery leaks and causes this issue?

Yes, it's usually fixable though. I had a similar problem and a UniBIOS helped to diagnose it - you can look at the cartridge from the CPU's perspective and see if there's an address/data line that's out. Or, just get out a meter and start checking each trace.

alby13 · Jul 6, 2016

you guys are awesome. good to know

batteries seem to be the enemy of old arcade boards!

Alpha Skyhawk · Jul 6, 2016

This helped me with my 4 slot's crosshatch problem. http://www.neo-geo.com/forums/showt...ut-(a-contribution-to-the-crosshatch-problem)

4-Slot MVS Not Detecting Games - Goes to BIOS

alby13

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