Flying Phantom 1. I hit a tree at about shoulder height. It was a slow movement into bushy trees so no hard whack, but it did fall a few feet. I can now take off for about 6 seconds, then it comes to do an auto land. I thought a faulty battery but the battery is fully charged. I have 8 to work with and it does the same on the few I tested. I put the phantom one the bench and plugged in the usb and ran the naza software. It shows exact voltage I register on the volt tester we all use. Do you think it is a bad solder joint now? Any way to figure this one out?