thebman80
Well-known member
I built a Missile Command to JAMMA test harness for my PCB and I'm having some Sync issues. Or at least I believe the problem is the Sync I can't get a steady picture to appear on my test rig what so ever. I know the Monitor is good because I have run different games on it today. I know the + Sync is what the board runs off of but when hooked up to the monitor I get nothing but a scrambled screen. When I say Scrambled screen I don't me a stable picture with graphics glitches I mean a screen that keeps moving and is different colors and looks like the sync isn't adjusted right. I have tried switching the sync wires around and I tried the composite sync off the board but still get no stable pic. Any Ideas? I wish someone had a dedicated cabinet near by so I could just pop the PCB in and test it out to see if its a board issue.