I had to replace the center pop bumper with a new coil and then my left lower flipper stopped working. I checked all fuses and removed the diode that came with the replacement coil for the pop bumper. The original coil didn't have a diode, so I took off the one that came with the replacement. With the diode and without, the lower left flipper has stopped working. The Count-Down has upper and lower flippers that work together. The upper small left flipper works, but not the lower left flipper. Any help would be appreciated. Thanks, Stan

Thanks, but I discovered the problem. Just needed to clean contact and increase tension and worked again.