I got a UMK3 (wolf PCB) that has bad U13,U14,U15 on boot up and then has bad backgrounds during game play (vertical lines) , I have replaced all three with known good ram chips and they are still showing bad, so just for the hell of it I replaced the socketed square chips, no luck. Im guessing its probably one chip that controls the ram not sure which though anyone ever have a ram issue like this that they fixed that wasnt the ram chip itself?


