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stasalein

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Hi everyone, fired up my M1VB after a couple of months and suddenly it has weird lines in most sprites but some look fine like the health bars etc, i have a unibios installed i checked it's connections and all seems fine, any idea what is the problem? is this fixable?
 

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Test another game and clean every connectors.
It seems related to bad S/C rom address lines.
 
It’s not a MVS but my SNK Street Smart board had a similar issue when it arrived.



I was told by @Hammy to check the pins on the underside of the pcb to make sure they were squished and grounding out on each other.



And after a careful combover. He was right bridges pins. No more lines.



 
They are not the same problem. You is related to fix layer fucking up the whole screen.
The initial problem is more like column doubling of sprites, fix layer looks ok.
 
Thanks everybody for trying to help, just now had time to look at it - i'm pretty sure it is some bad contact on the top board.
mine has the neo-buf replaced with a bypass (could this cause issues ??
also found the video which looks like a similar problem i like the idea of using MAME to find the problem (look a bit time consuming though)
View: https://youtu.be/moZjqVcp5I4
 

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