Hi, During "Phantom 1" takeoff, the main light suddenly started to flash red rapidly. Just the same type of flash when the battery is critically low. The Phantom went straight to left and crashed. There were no damages as it just hovered 10-20 cm above the ground. Trying to start up the drone again, and the front left direction led started to flash red. Normally this would have a constant red. There were no errors on the other 3 direction leds. The speed of the front left was also different, as it went too slow. My best guesses is that this error was before the takeoff, and was the reason that it went straight to left. Could there be some bad connection, motor problems or something? Any help?