So working again on getting some light gun games up and running. Trying to get into a calibration menu, but the service screen requires using a "service" button to navigate. I seem to have no such thing. Anyone know of a work around?
You're basic Chinese "cbox" style one. Has test, but not service (shrug). Ah, but now that you mention it I do have a Chinese JAMMA extension cable (with adjustments to vert/horz position etc) that DOES have test+service. So I'll just use that.