Neo Geo MVS 4 Slot - dots on graphics

[callanbrown]

Hi all,

Wondering if anyone has seen this before. This 4 slot board is showing black dots on the right quadrant of the screen on all slots, and different cartridges.

Thanks!

 

[ack]

https://wiki.neogeodev.org/index.php?title=Graphic_glitches#Internal_bus_problems

 

[Kujako]

https://wiki.neogeodev.org/index.php?title=Graphic_glitches#Internal_bus_problems

Yup, got to check all the traces twixt LSPC2 and NEO-B1.

 

[callanbrown]

Cool, thanks for that info.

My 4 slot actually has LSPC-A0 and PRO-B0. So I went through with those two figures and checked all the connections - they are all there, nothing missing that I can find.

What could I try next?

 

[callanbrown]

Just to wrap this up, I found some PRO-B0 chips on eBay, received one today and it has fixed my problem!