I seem to be having a syncing issue with a 60 in 1 board on a k7400. (Previously I had a MK3 board in the cabinet working perfectly fine.) I've tried about every pin combo I can think of (vertical, horizontal, grounded, not grounded, etc.) and I'm about at my wits end. I'm wondering if there is anything else I should try before I return the 60 in 1 and try rolling the dice again?