I recently bought a 2 year old Phantom 3 which seemed to be in good shape other than a faulty battery which I replaced. I put my time into the posts and videos and had it flying in no time. Yay for me! That lasted just a few days, then yesterday while attempting a simple take off it drifted sideways quickly and into a tree branch. No real damage but I got a IMU error. I've been trying to recalibrate the IMU but the first time it went up to 36% and got stuck for 20 minutes. I restarted everything and tried again, it only went up to 2%. I shut it down, recharged the batteries and walked away for several hours. I just tried again and same thing, stuck at 2%. Can someone please help me?