Problem with mv1b motherboard

[konrad]

problem with mv1b, z80 error appears on the screen. Will it be the connections that go to the chip or the z80 chip? I have removed the battery and I have seen a little corrosion, what is the solution? greetings

 

[Neo Alec]

It could be either. You should use a multimeter to check all the connections in the area of visible corrosion.

You should also install at diag bios and run that if possible:

GitHub - jwestfall69/neogeo-diag-bios: Disassembly of smkdan's Neo Geo Diagnostics BIOS with added features

Disassembly of smkdan's Neo Geo Diagnostics BIOS with added features - jwestfall69/neogeo-diag-bios

github.com

 

[konrad]

Picture screen.

 

[BIG BEAR]

Its most likely that the chip needs to be replace so you would want to start there.
BB