When you power on, the MPU boots and it goes into attract mode, but for some reason all the solenoids fire at once and blow the 2.5a fuse.
I've checked the PS and everything looks ok.
I don't completely understand the blanking signal and how the PIA works, but am I correct if the blanking signal is always high for some reason, it would make them all fire?
Doesn't the PIA for controlled lamps use the same blanking though?