gimbal control board

I apologize for this being so long winded. So I have dug and dug and I can only find a thread of one other having this same issue, and there was never a resolution. I received the drone in pieces for free to see if I could rebuild it. I replaced all 4 arms, the chassis, the gimbal arm, and...

I am having an issue with gimbal control pcb board. I have 1x working gimbal + gimbal board which I am using for testing. I have 3x other boards that all have the same issue when I attach the known working camera to it. These all work partly in that I can see video, but I have no control in the...