I was hoping one of you might have an idea where I should start looking.
I am going to look at a friends Tri- Zone soon but I don't know a lot about early 80s games.
Below is a copy and paste of his problem.
If anyone has any tips on what to start with that would be great.
"The one that causes me the most grief is the oldest one (1979 Tri-Zone)
It powers up and plays just fine.
However, the bottom row of lights on the header don't work (player 1,2,3,4,
game over, tilt, high score, etc.) "