MVS 2 slot repair

[TMOSteel]

Looking for MVS 2 slot repair recommendations - went to boot my MVS Gold cab today to test a cart only to be greeted with the dreaded "green screen." I cleaned around the battery but did not see anything jumping out at me as far as corrosion goes.

If anyone repairs 2 slots or can recommend someone who does quality work I would appreciate it. I'd like to get my MVS back up and running.

https://imgur.com/a/dnJCmy1

 

[Neo Alec]

That looks like the beginning of a normal self test. What does it do without a cart inserted?

 

[TMOSteel]

That looks like the beginning of a normal self test. What does it do without a cart inserted?

Problem is, that's all it does, over and over. I forget what happened without a cart, I'll have to test it again.

 

[BIG BEAR]

And you have dip switch 8 set to off,correct?
I forgot to ask you that.
BB

 

[matman]

Am somewhat still learning here but that seems to line up with symptoms of a calendar error.. which could be a bad ic or crystal. But I’m just referencing channelmaniacs repair logs.

 

[TMOSteel]

And you have dip switch 8 set to off,correct?
I forgot to ask you that.
BB

Good question, no idea to be honest. I've never messed with the DIP settings on this MVS, I purchased this years ago from a former arcade guy from his collection. I had to look up what that DIP is:

Switch 8: Freeze - pauses the game (done by software in a system ROM call)

I can't see that getting enabled, I literally played this years ago and just powered it down. I haven't messed with it since getting an Omega but as I've now gotten into the mini cabs (Arcade1Up, MVSX, iiRcade) I wanted to assess what I need to either restore this cab or customize it (keeping it a dedicated 2 slot of course).

Its time this cab moves from the garage into my house.

I'll check before I pull the board to send it off to you, thanks again for responding to my PM.

 

[TMOSteel]

Pulled the board, all DIPs are off.

Neo Alec the board does the exact same thing with no cart inserted.

 

[matman]

Did you figure this out?

 

[BIG BEAR]

Did you figure this out?

The original battery took an acid sh8t on it's neighbors nearby.. all over the diodes,resistors,transistors and a few chips including a little bit of the ZMC2 . I'm working on it now. and also discovering several tracks have been broken/damaged relative to the HC32 chip ,1s1588 diode to the 47 ohm capacitor......etc
BB

 

[matman]

sounds like 1 of my boards i'm working on. thanks for the update