I have a project Laser Ball machine that wasn't booting, only GI lights. Some corrision on the mpu and driver boards so I put in a new Kohout set to replace those two and the game now boots into attract mode and I can add credits and start a game but the flippers are the only solenoids that will activate. Also not getting any sound. Apologies for the basic questions but would anyone have any recommendations on what to check next? Thanks!