Hoping for some guidance please. My P2 which has only been flown 3-4 times suddenly won't start up and won't connect to the assistant software. When I go through the start sequence all it does is continuously beep and flash two red led lights. Eventually the beeping stops and lights stop flashing but unless I then turn the P2 off, one motor will power up, then stop, then another will start up. Really strange stuff. I've tried every conceivable method to link the P2 to the assistant software but there's no connectivity. A week or so ago I upgraded the firmware and also upgraded the controller as well. Any ideas? I can find no logical explanation.