I just got this game, and it wasn't working. The battery on the main board was dead, so I swapped in a different one until I get a new battery, so that got it to boot up. Now it gives me a TOP BOX COMMUNICATION ERROR. The PSU up there was dead, so I swapped that out, which got the LCD up, and gave me the screen showing the WMS screenstack OS msg and ROM Id, etc, but won't load the graphics up there. My guess is there is at least one corrupt ROM in the top box.
I changed to the only other dual screen game that I just happened to have chips for already (this is my first dual screen machine...although I already had a spare top box laying around), Stampede Deluxe. That loaded up top, but had corrupt graphics below and wouldn't take credits. Apparently it has a bad ROM somewhere down below. ARRGH! But it shows that top box works ok.
HELP!??!