I'm writing this in case anyone else has a similar experience. I bought my P2V on Nov. 7 and have flown it probably 30 times without problems. That's not to say that I didn't have hard landings in the beginning where I chipped props and had to replace them, but nothing catastrophic. At least not until 2 days ago. I have installed all the firmware upgrades that DJI has issued and have installed a Flytrex core. Here's what happened. I had been flying for a little over 12 minutes and had 48 % battery left according to the DJI app on my phone. I was ending the flight because I live in Michigan and my hands were to cold to continue. I was flying in Attitude mode. I brought the Vision down to about 20 feet of altitude over my front yard and it was hovering. Without warning it fell to the ground like a rock. Luckily, I have about 8 inches of snow in my yard so the impact was somewhat cushioned by the snow. The only visible damage was two chipped props. I shut everything down and brought the Vision in the house to get the snow off of it. Since I still had plenty of battery left, I powered up the flight battery. The battery came on, but there was nothing happening on the vision. No noise, no flashing lights, nothing. I shut down the battery and removed it. Then I powered it back up to check the voltage output. It read 12.1 volts so I knew the battery was working. In order to check the voltage to the controller board, I had to take the vision apart, just like when I installed the Flytrex core. When the top cover is removed the controller board is visible. I put the battery back in the vision and powered it up. I checked the voltage on the board at the point where the wires from the battery connect to it. It was zero. So I started checking the wires that run from the battery terminal to the circuit board. There I found the problem. The black wire had disconnect from the battery terminal at the solder joint. If I touched the black wire against the solder joint where it belonged, the vision fired up as it normally does. So now my task is to take out the controller board and re-solder the joint. I suspect it was a cold joint when originally built. The difficulty in doing this is the battery terminal is buried under the controller board so I know it will require a lot of dis-assembly to get at it. Wish me luck and I'll let you all know how I make out.