Quoted from Chrizg:
Check each wire in the switch row for every switch looking for a broken wire. Start at the shooter lane and work your way right. If there are no broken wires then test Q2 on the cpu as that transistor might be bad. You might have touched something when installing your mods and shorted Q2.
Quoted from TomGWI:
I have broken wires accidentally placing the playfield back in the cab. Sometimes the wires in the back can get pinched.
This is were a MultiMeter set to continuity will help - testing the ground wires on the switches in that row to the connector in the back.
You may have to follow the wire from the last switch in the row all the way to the connector until you find a break (if you are certain no ground wire came off one of those switches).
Thanks guys for the tips. I checked every wire connected on that switch row and everything seems fine.
I did check for resistance with my multimeter set to continuity from the ground wires on the switches for the row back to J1 P3 and got a value on each. This problem has been a PITA but hey I'm learning something along the way, lol.
I tried to test the Q2 transistor but can't get a value from that one or any of the transitors. I have to put the probe from the mulitmeter right on the middle connector of the resistor (not the tab) to get a value, I can't get it for Q2 as its so close to the other transistors.
I keep going back to the 10 pin and 2 pin connectors on the trough as that is the only thing I removed. All the wires look fine though and the 10 pin connector cannot be installed backwards due to the pin configuration. Wires on 10 pin and 2 pin line up on each side.