Not sure where to post this question. I have a Data East TMNT. When I got it the top right pop bumper didn't pop although it did score. The game played without any other issues. After some investigation I noticed a burnt out resistor on the CPU board. (See red arrow) I replace the resistor and the two adjacent transistors. (See purple arrows.) I turned the machine on and the coil on the pop bumper got extremely hot and started to smoke. I shut down and ordered a new replacement coil which I have just received. Before I burn out another coil, is there anything else I should check?

I also have a second question regarding this game. Before I started messing with the pop bumper, I had some issues with the score display sometimes freezing, showing the code originally displayed at start up or otherwise not consistently showing the score. It would display the various animations, and would show the score when it added the bonus, but otherwise it was very inconsistent on displaying the score. Any suggestions would be helpful. Thanks.

tmnt 2 (resized).jpg

Thanks. I'll give that a shot. I ordered some new transistors and hopefully can get back at this in a week. I also noted that when I did a continuity check between the ground and the top of the topmost TIP122 resistor there was continuity. I did this with the machine unplugged and the cable connector to the right of the resistors unplugged. With the cable connected, all TIP122 resistors showed continuity except for the bottom one.