Basic soldering, circuit troubleshooting help.

[SideShow Bob]

It is a basic wig wag circuit using NPN transistors to alternate the rows of LEDs, and each board is independent. In other words, yes, the capacitor could cause it not to function.

[th3w01f]

It is a basic wig wag circuit using NPN transistors to alternate the rows of LEDs, and each board is independent. In other words, yes, the capacitor could cause it not to function.

I tried re-soldering but no luck, any advice on how to tell if that's the issue? I've figured out I can light opposite lights on the non-working board simultaneously by applying power to a single post of a light and a resistor but since I don't know what I'm doing that doesn't really tell me much.