I ordered a used naza flight controller and guess what.
It flies!!!
Thanks everyone for the help!!
So your uncle not only shorted out the board but the Naza module as well while trying to install that after market gimbal. Well you're now the proud owner of a P2 for the price of a module. So what do you intend to do now? Are you going to finish outfitting with a FPV system or fly it as is?