Hi. I know it's old school now but my phantom 2 was still in mint condition and all of a sudden, the blinking red lights started to come after take off. This happens everytime now and I'm not able to fly it. I've done all the standard calibrations a bunch of times. Tried the magnet trick, and still no luck. Does anyone out there have any original ideas of how to fix this? And if it is the battery, which I have 2 different ones that I've tried using, does anyone have or know where I can get a cheap new one?