Hello, I am working on my Haunted House. I have several new parts installed including all new pop bumper boards, mpu, and power supply board. My pop bumpers keep getting locked on and popping the fuse. I have installed all new pop bumper boards and replaced the diodes on the coils but it is still causing the same issues. Are there transistors for the pop bumpers on the driver board as well or are they only fired by their individual pop bumper boards?