Bally Game Show Back Box GI Light Issue

dyno

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Just picked up a Bally Game Show, very fun pin. The genereal illumination lights in the back box weren't working so I took a peak at the interconnect pcb. When I unplug the J5 connector the general illumination lights come on but then the ball kicker doesn't work and I think that powers the flippers also, when I plug J5 back in the GI lights for the back box go out and then the kicker works again. Any ideas what could be causing the lights not to work when the J5 connector is plugged in?
 
That interconnect board is well-known for numerous cold solder joints at the connector header pins all over the board. Many times the general illumination circuit connectors burn to a crisp.
 
Thanks for the info Ken:) I will take the interconnect board off and check the header connector pins for cold solder joints, hopefully that will fix the issue.
 
I removed the interconnect board and 3 pins on J9 had ugly looking solder joints, I will have to fix that tomorrow. All other solder joints look good, could the bad solder joints be causing the GI lights to go out when J5 is plugged in and work when J5 is unplugged?
 
Reflowed the bad solder pin heads and no luck. There is a relay on the back box door that clicks when I plug J5 in which is power and the lights stop working but when I unplug the J5 harness the back boc GI lights work. Could it be a bad realy?
 
Relay could be bad but I look back to the interconnect board, not only are the solder joints bad but the connectors get wrenched and you may have a bad ground there, look to replace the female headers too and inspect the pins, I have had burnt wires there too, I would switch to trifurcon pins if you can
 
I noticed that the relay on the small circuit board on the inside of the door for the back box has been changed. The original was a 24vdc 13amp relay and the new one that has been put in is a 24vdc 10 amp, would the difference in the amperage cause an issue?
 
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