I have a Phantom 4 with very low hours. I bought from DJI. Never crashed. I've tried 3 different cards 16gb, 32gb, and 64gb. Rebooted. Updated firmware. Tried everything. When the fan comes on video cuts out and error warning shows up. Gimble seems a bit laggy as well. Seems less stable than before.  Just wondering what is happening and how it needs to be addressed.

Sorry for the issue you are faced with, for this case, I would recommend you send it in for diagnosis and repair. https://repair.dji.com/en/SelfRepair/Area