Minor Tech: Robotron P2 stuck on - what do you think?
So I finally got my Robotron working. The player 2 button tests as stuck on so that I can't play 2-player games. But everything else works. I unplugged the harness and it still shows that it's stuck on. I unplugged the 2 connectors from the small PCB (controller?) card and it still shows that it's stuck on.
Then I unplugged the ribbon cable that goes from that small PCB to the main game PCB and, finally, it no longer shows that the P2 button is on.
So my questions is....where should I look for the problem first? Is the ribbon cable likely bad? Or the small controller board? Or something on the main PCB?
I'm betting on the ribbon cable having a short in it. But I don't really know how to replace this sucker....and....I don't want to have to wait on a new one now because I'm tired of waiting on parts!
Thanks for any tips!
John
So I finally got my Robotron working. The player 2 button tests as stuck on so that I can't play 2-player games. But everything else works. I unplugged the harness and it still shows that it's stuck on. I unplugged the 2 connectors from the small PCB (controller?) card and it still shows that it's stuck on.
Then I unplugged the ribbon cable that goes from that small PCB to the main game PCB and, finally, it no longer shows that the P2 button is on.
So my questions is....where should I look for the problem first? Is the ribbon cable likely bad? Or the small controller board? Or something on the main PCB?
I'm betting on the ribbon cable having a short in it. But I don't really know how to replace this sucker....and....I don't want to have to wait on a new one now because I'm tired of waiting on parts!
Thanks for any tips!
John
