MVS Game Line Up Compatibly Issue(Neo Mr Do!

MVS Game Line Up Compatibly Issue>>>>


Neo Geo MVS U4 Candy Cab.
Smaller MVS 4 slot Board with very old version UNI BIOS chip.
set on USA Arcade


The Line up in my MVS Candy Cab was >

Baseball Stars
Metal Slug X
Street Hoop
Last Blade 2

No Problems with that line-up............................................

Last Night I took out Last Blade 2 and put in Neo Mr Do!(for kids,company coming over)

I cleaned the contacts on Neo Mr Do real well before putting the game in the cab..The game had just been taken out of the Big Red the day before.

Demo Sound set to on..when the demos would reach Neo Mr Do the sound would be out on it.
.. I checked the soft dip settings again an again and everything for sound was on..

during the demos the sound would be off in this game only once reached..
but once the machine cycled back to the first game in the line up the sound be be on for all three of the games in the line up of the mobo before it

Selecting to Neo Mr Do! I'd still get no sound..Starting a Neo Mr Do! Game I'd still get no sound..

Cleared the Back up Ram......... Twice..No change..

Machine on and off several Times,no change.

I took the Neo Mr Do! game out and switched it in the line up with Metal Slug X and the problem is fixed..

Weird Shit.

That's pretty much standard stuff with the 4 and 6 slot mobos. They are just picky sometimes. One member had to do a 1 by 1 line up to ensure all of them working. He would put the problem game in slot 1 then add another cart and another until all 6 were working perfectly. He said it took him 3 hours.