$10 PayPal for the first person who can point me right to the problem(s) to get this fixed.

Ok. So I'm a noob. I broke the number one commandment and did leds with power on in my friends data east Star Wars. I suck. I should have known. Now I have all kinds of lamp matrix problems. Single lamp tests often light up two and three lamps. There is a decided pattern. I tested the board, its fine. I'm guessing shorts and or diodes out. I will do some wire tracing, but I'm wondering if anyone can identify the problem from my single lamp test results:

I will attach my notes scribbled on the lamp matrix in the manual (I labeled with letters the lamp tested and a the same letter starred or primed ' on the lamp that also lit incorrectly) but I will try to make sense of the pattern to the problems.

Basically, row 7 seems to mostly work normally. But anything above it in the early columns (1-3) lights itself, the lamp in the same row in column 6 and in the same column but 7th row. For example, lamp 2 also lights lamp 7 and lamp 42. Or lamp 11 also lights 15 and 43.

Column 6 has similar bahavior. Anything in c7 or 8 mirrors over to same row, in c6.

There are some other patterns, but hopefully this will be enough to get me something to fix to reduce the chaos for further testing.

IMG_0515 (resized).JPG

Yes. On the lamp matrix, do I have to desolder? And are there any logical places to start?

Oh crap. I have no idea. It was from a grab bag sampler I think I got from pinballlife. Can that really happen?!!

Much appreciated. I will go over them one by one. I'm just a little worried I wouldn't recognize a properly configured one from incorrect. Do diodes in circuit in the lamp matrix test normally? Or do I have to unsolder to test if they're bad?

Yep. For me it was a backward diode after all. Good quality led or incandescent can mask the problem so it seems to appear when some people switch to led.