Well, Caveman just started to do this yesterday:
When the pin is turned on, all the coils fire immediately & I think some stay locked on.
I looked inside the coin door and I can see the free game knocker fire and stay locked until I power off. I see the pop bumpers all fire once and all the insert lights come on and stay on. I dare not let it stay on for more than 2-3 seconds so I power pin off immediately to avoid frying coils or transistors.
I am not very familiar with Gottlieb issues like I am with Bally/Williams, so any suggestions what to check first would be greatly appreciated.