I accidently shorted 2 diods yesterday when trying to fix a droptarget issue resulting in a non working game. Now the game boots up and everything goes as it should until I try to puch the startbutton or the testbutton in coindore, I cant manully add credits. The game have credist in it but acts like it dont have.

I change the cpuboard to a janin that I have in my other game and the game works as it should. So I blew up somthing on the cpu board!? I have alot of spare cpu boards but all with diffrent issues. So my question is what on the cpuboard should I change to fix the cpu board. WHat on the cpuboard handels the coindoore?

z11 and z12 7404?