Hello, I was in the middle of installing my an emmerson transmitter and osd mini on my P2. Following an online video, I tried to update the firmware on the osd mini and my p2 would initialize. I turn it on 4 quick lights blink then I can hear a little click noise and it turns off completely. I've visually checked all wire and even removed connections to the osd, video transmitter, and fpv hub with nothing changing, same 4 lights then nothing. Is there anything obvious that I'm missing? I've also tried 2 other batteries. The p2 hasn't been flown in 3 weeks but worked fine on all previous flights and it's never been crashed. Thanks for your help.