Got a P3 Standard in December of 2015. Friend crashed it. Made him buy it. He sat on it till now and I got it back from him to fix and keep for myself. Minor damage other than Gimbal twitching on start up and ribbon cable nicked so I replaced it. I get messages saying I need to update and a weak signal on remote controller on DJI App and no video. I relinked the remote control to drone. I have a green light. I still don't have a good connection on DJI Ap and it still says weak signal. I then tried to do a Firmware update since it's been sitting since Dec. 2015. I tried the latest update but it failed 3 times after trying to format sd card and trying new sd card which was formatted as well. I downloaded the update onto sd card then put it in drone when I tried because I get a (Device Disconnected. Please check) on the DJI App. and it won't install from the app. So what do I try next? After looking all over internet I'm guessing I need older firmware versions??? HELP!!!