I am trouble shooting a friends Phantom 1 and I need to pick your brain. It has a p2 receiver and NAZA-m v2. a zenmuse and PMU was added. No matter were I power it up, it will not find enough satellites. (one green, three red). I can power up mine right next to it, and have no problem acquiring satellites. I even put my top on his, same thing. (one green, three red). The PMU is not the problem. I took it out of the circuit and still have the same problem. the only thing I haven't swapped yet is the compass and NAZA. Please advise.