Got my first Gameplan game recently. It booted when I got it but didn't start a game. That's now been resolved and I am now working on the insert lights. None of them work. I lifted the playfield and I get 6.3V on the power braid and the tabs of the few return wires that I tested. I touched a few points on the board and got voltage on the drivers too. The bulbs aren't all burned out, as I inspected a few and those were fine. Looks like there just isn't any info about which lights to turn on getting sent out because all the power issues that could happen check out just fine. As my first Gameplan, I'm wondering if there is anything else I can look at to see what's up. Thanks.

Do you mean the .100 connectors on the light board, or the beefy ones between the head and the playfield?

I have the schematic to reference on IPDB.

I don't have another GP game, but do have a logic probe and very minimal experience with it. So I can poke around and see what I can figure out.

Is there a good spot to tap into 5V for the logic probe? The test points are flat spots, not studs or loops. Looks like J1-1/2/5/7 are the enable pins for the 4 chips on the lamp board. going to assume I should check those and also the outputs for U1/2/3/6 to see if those are sending signals to the transistors.

Ok, J4 on the light board isn't used and I found a few pins that have 6VDC. I used pin 9. Then attached to the "ground here" braid and the light on the probe turned on. I touched pin 23 on each of U1/2/3/6, which is the enable pin. Those are all high. Then I touched pins 4-11 on each chip and those are all low.