Hey guys inight a neo geo 1 slot mvs with a art of fighting cartridge. The machine was not working the guy i bought it from said he thought the cartridge went bad cause he had issues with it but could usually get it to work after cleaning. After my attempts if cleaning the cartridge I decided to buy one. So with the old cartridge i got nothing on the screen the screen would just light up. With the cartridge cartridge I just received that supposedly works I get an error message.
(work ram error
address write read
0000ffff 0000 0800)

Is there anything else i can do besides pulling the old rams off the board and replacing them.