Bingo! It seems the answer is often far simpler than you think. Bad connections were the culprit due to the enamel. I sanded them down, tinned, twisted, then soldered and it works perfectly! Thank you @Oso and @cheddarman
That might be it... I just cut, twisted and soldered. I didn't know there was a coating on the wires but that would explain why the solder had trouble sticking. I'll give it a shot.
I recently purchased a "broken" Phantom 3 Pro and have been trying to fix it. Everything is working so far except for I am receiving the ESC error when attempting motor startup. I installed v1.11.30 FW and that didn't make a difference.
Condition of the P3P:
- All circuit boards seems okay...