I'm trying to diagnose and maybe repair a light board on a GB pro.(Stern Spike2)
I'm a newb with this - any help would be greatly appreciated.
The problem is - all LEDs and flashers connected to light board D are in a constant on status.
Things I did: I replace board D with a new board and I jiggled wires and plugged and unplugged things to ensure they were seated good. No luck same problem. I also checked continuity between the cables and the boards. B-C cable and C-D cable. These checked out ok.
Something that worked: I bypassed board C and plugged board D directly into board B and all lights on board D now function properly. So this leads me to believe board C is the culprit. Even though all the LEDs on board C appear to be functioning properly.
From here I am at a loss as to how to test or troubleshoot board C. The one thing I could think of was check continuity of the pins on the input socket to the pins on the output socket and there seems to be good continuity accross the socket pins.
I can buy a new board C for $150 - but maybe I can check/test something else?
Note: Picture shows normal link routing in green and the bypass test in red.