I've completed my MAME cab and have fired up everything only to have the J-Pac SYNC OK LED unt. No picture to 20" Hantarex Polo. I'm also using s ArcadeVGA cards.
I know from the J-Pac guide no sync signal is being sent because it is out of range of the monitor but I don't know the possible reasons for this.
I've just changed the motherboard and this wasn't a problem before I changed it. Any correlation?
Nothing else has changed. Something blown in the monitor?

Tibbs