CPS 2 Issues - Marvel Super Heroes

[mr_b]

I've taken a stab at trying to repair some CPS2 boards I got really cheap as an excuse to test out my new eprom burner. The pictures below show the graphical issues I'm experiencing.

What I've done thus far.

-Program roms and GFX roms checksums match against the corresponding Mame set.

- All Roms have been re-seated on the "B" board.

- Other "B" boards work fine against this "A" board.


In the searching I've done and speaking with Bustedstr8 in chat. Seems like this could be a ram error. Is there any way to verify the ram is good or bad? I don't have a logic probe, all I got is a multimeter and I don't think any continuity checks would help. I've taken a look at the solder joints on both the ram chips in location 3A & 4A and they look good to me.

I got no problems buying and replacing the sram if it is indeed the issue, just wanna make sure I can properly pinpoint the issue.

Thanks,

Mr_b

 

[Tyranix95]

Enter Test Mode and run the ROM Test.

Does the game play ok (with sound and graphics) all messed up?

 

[mr_b]

Yeah if I go into the test menu and do the memory check everything comes back "ok". The game and sound are fine. I can play the game and everything is functioning as it should.

 

[Tyranix95]

Post a board pic.

And what version are the roms?

Also, what other CPS2 boards do you have?