gps reset

I lost my MP in Panama and found it three weeks later, it had crashed against a wall. I have ordered a replacement canopy: the electronics are exposed, but I'm trying to find out if it is capable of flying. I plan to recalibrate everything from scratch, but I am stuck... I get a system warning...

So I've had the Mavic Pro Platinum for about ten days - very impressed with it (I also fly an Inspire 1 RAW and an Inspire 1 XT infrared, a Yuneec Typhoon and a Phantom 3 as a basic trainer). Two days ago, when I set up the drone to take off, the controller had this message: "SYS WARNING CHECK...