Hello,

Just got a new Rottendog MPU for my Taxi as well as a Kohout (pinballpcb.com) AUX Driver board. After everything was installed it played great for most of the day, but now the AUX Driver board is blowing the F4 fuse. Also, the PIA is flashing (has been since install) on the Rottendog MPU. Any ideas?

Thanks,

Jeremy

Anyone?

It's the center LED on the original board, the same light is on the far right on a Rottendog, so I'll assume that's normal.

I'll check the solenoids. I ran across another post online that suggested a bad bridge rectifier. It's a quick and easy fix so I have one on order. Since all 3 boards are new and it played fine for quite a few games I wouldn't be surprised if it was the bridge rectifier.

I'll update this with my findings.

New bridge rectifier, same problem. F4 on the AUX Driver board is still blowing upon power up. It goes to J11 on the interconnect board and controls the ball kickout and the ball lock, and probably something else but I don't know where to find that info.

This makes zero sense because after replacing the MPU, AUX Driver board, and Power supply it played fine for about 8 games over 30 minutes.

Let me know what the next step in the solution would be.

Thanks,

Jeremy

Anyone?

Problem solved here: http://pinside.com/pinball/forum/topic/taxi-blowing-f4-fuse-on-driver-board