I recently purchased a TZ a few weeks ago and everything was working really well. While playing a 4th ball was added to the gum ball and had to stop the game. After resetting the game, the game starts, but no ball ejected. I went into the service mode to eject the balls from the gum ball and get genva switch error. I do not hear the gumball motor before entering test mode. Also, none of my flashers are working now.

After doing some searching, someone suggested replacing fuse 111, but that didn't correct the issue. Now I am thinking there is an issue with the driver board. Another post suggested to replace the bridge rectifiers and caps. Maybe it would be to just replace the board with new Rottendog board but new ones are pretty pricey. Given the board is 27 years old, would it be better just to replace, or try and have the board serviced? Thought?
Driverboard (resized).jpg

Sorry, I meant fuse 111. I'll spend sometime testing the other fuses too.

I replaced the old driver board with a new driver board from https://pinballbasement.com/.

I did notice the old board had the https://kahr.us power reset fix chip installed. Since the board is new, I removed it. Should I just keep it in? The new board has updated 5v circuits so hoping this is no longer an issue.

Any ideas on what to do with the old board?

oldboard (resized).jpg

oldboard2 (resized).jpg

Yes, the new board works even better. It fixed the issue with flashers and gumball motor not working and I think it also enabled dimming on GI or at least the dim level is better now.

Good suggestion. Thanks and Happy New Year.