2nd day playing my NIB IMVE the War Machine opto started acting up firing off and causing the kick back mechanism to fire and start multi-ball. It did this 10-15 times and then it just stopped. The opto is no longer registering. When I touch one of the solder joints of the reciever it triggers the switch test but I think that is because I am grounding the opto. I am guessing the receiver is dead?