Moonwalker with white stripes.

[Xico77]

Hi! This Moonwalker have this white bars or stripes on the screen, the ram/rom test gives all ok, and I tested and replaced the other roms with no difference. I changed the cpu/program roms to a decrypted set with no change. Someone could give me some hints of what to look for? Thanks!

View attachment 88582

 

[Trol]

Bad mask rom?

 

[channelmaniac]

Or a bad RAM. Not all show up on self tests.

Bad mask rom?

 

[Xico77]

I tested and replaced all mask roms, and replaced the 68k to be sure this is not a suicide problem, but It had no difference.
I piggibacked the rams not tested in the service menu, and nothing, no difference. I can remove and test the rams, but I accept any feedback first.