Quoted from killborn:

Hi thanks for responding to this thread! I would appreciate all the help I can get!
I have tried wiggling both connectors and I even disconnected the J6 connector to see if anything looked suspicious and reseated it and still the row won't light.
I've looked at wires underneath the playfield following the red/green wire to all of the sockets and nothing looked broken.
I took Grumpy's advice earlier in the thread and tried to figure out which diodes/resistors/transistors went to row 5. I know Q84 is connected and I it looked to me like D12 and D13 were also. I did some DMM testing on those parts in circuit (which I am still learning and didn't test anything yet out of circuit because I have never soldered anything before) and D12 was the only part that produced suspicious readings. With the black lead on the stripe side all of the diodes were testing 0.596, but D12 was testing 2.4. I understand from doing a lot of reading, you tube videos and other threads that testing in circuit isn't reliable, but they were all (diodes, resistors, transistors) producing similar results except that diode so I figured I would start there unless you have some other advice or things to test.

Quoted from killborn:

That's a good idea, thank you so much!
This is all great information, I really appreciate it.
I will have time tomorrow to shift j6 over a pin and then do further tests on D-12 if need be.
Seriously, you guys rock!

Quoted from PINTEC:

Playfield row 5 wiring tested working:
In lamp test go to PIA 54 where Row 5 signal begins, check for a moving signal at output Pin 6 then at IC U56 Pin 1 and 2 using a logic probe.
if signals present replace Q 84 If no signal is present then the signal must be confirmed before moving to D12 and R13 as Signal must be present at U56 Pin 2 for the Row to operate If Its Missing then problem must be found before proceeding.
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Quoted from killborn:

I have a logic probe arriving on Monday. I've never used a logic probe before, can you instruct me as to where's the best place to put the negative and positive leads?

Quoted from PINTEC:

[quoted image]

Quoted from killborn:

I received my logic probe today so I am ready to start testing.
I have some questions before I start:
What logic family should I use to test both PIA U54 and IC U56? CMOS OR TTL?
Should I be in ALL lamp test, or attract mode?
Will there be any problems since D12 has already been removed from the circuit?

Quoted from killborn:

Since I need to replace D12 to finish testing, I better brush up on my solder skills. I have some practice kits I'm going to use, and I'm still chugging through Terryb's solder guide, (and logic probe guide).
Grumpy and Pintec, I appreciate your help and especially your patience as I make my way to the end of this particular problem. I'll get back to you guys once I get D12 replaced.

Quoted from killborn:

While in attract mode, with probe set to TTL and also set to pulse, I checked PIA 54 pin 6 and there was a signal. (I should note that after watching videos of most probes clearly displaying an arrow or light reading of low or high and making a sound that is either low or high, my probe looked and sounded like it was doing both, making a screeching sound.) Whether or not it was reading the right signal, there was definitely a signal.
I moved on to IC U56 pin 1 and 2, and there was a signal at both of those pins, similar in look and sound to PIA 54. Just to make sure I tested IC U56 3 and 4 and they produced similar results.