I have a Sammy Super At that was brought to me to fix. When you drop a token in it shows error CP. The token drops thru. The owner had a replacement coin assembly (Nikkon) it does the same thing. I swapped the sensors around but same thing. One of the led indicators is broken on interface board above it so I cant tell by that. It is the sensor on the right facing the front of the comparator that i know is working. It seems that the sensor on the left is not getting a signal or power to it. The CPU number is SS07BC03. Any help or thoughts appreciated.

Dennis