I'm new to drone flying and, in a series of unfortunate events, my phantom 2 ended up in the bottom of the river for about an hour. I followed all the advice I could find and dried everything out for a few days. The phantom turns on fine. But when I try to take off, the blades on one side go faster than the other and it flips. I thought one side of the drone was burnt out (like the motors or the ESC's) but then I tested it a few more times and the same thing happened from the other side. Here's a video to better explain: I'm up for any suggestions, but I haven't done much yet because I would rather try a cheap option before I go out and buy new parts. Thanks.