Edit: Always start with power. Skip to the last post to see it working. 5V alone is not enough for this board to work. Leaving my notes here in case they might help anyone troubleshoot their own.
Hello, I need some help identifying what is causing garbage on the screen for Starship 1 when turning it on. Running on a bare bones harness with 5V supplied directly to board and video output to tiny composite monitor I modified from some kids toy back in college. Only wired up coin inputs, power & video so far.
When powering on, it goes to what appears to be a static screen of white noise, however, if you watch closely you can see the planets/stars moving outward on the edges of the screen. And if you watch long enough, it will clear up and show the game behind the noise for about a second.
This tells me that something in the graphics system is overlaying on the screen, and I'm hoping I'll be able to pinpoint it with a logic probe/scope. The schematics are well detailed as for which signals are going where, so hoping for a hint as to where to begin.
Relevant timestamps from the video 0:07s, 0:25s, 0:43s & 0:59s for the quick flashes where everything briefly clears up. May need to set to 1080p quality so video compression doesn't b0rk it.




Holding down the coin1 button when powering it on gives the proper stuck coin message, and holding the coin button down it's on makes the white noise appear to waterfall down the display. Normal usage of the coin switch shouldn't be held down like this but it was interesting to see. Doing this is how I initially noticed the stars moving in the background as they are stationary while the coin switch is pressed.