New to the forum. did a quick search. could find thread addressing this:
I have a D750 with many miles. Last weekend, our second shooter was burning up SD cards as soon as she was putting them in. literally, burning up cards. As soon as you pulled the card out, you couldn't handle it, because it was so hot, it would burn your fingers. I got her to only use the primary card slot (no backup), and it went fine, but we need to get this fixed, of course.
This had never happened before, but as soon as she started using it last weekend, the problem started, so it wasn't overworked/overheated. hadn't been sitting in sunlight, etc. She was not shooting any video, and the 2nd slot was only being used as backup.
Have any of you heard of this before, because it has never happened to us with any camera in 7 years of photography. I couldn't find anything on the Google machine, so it leads me to believe that this is pretty rare. I will be taking it in for service, but if it is something a hard reset can fix, it will keep us from being without this camera too long during busy season.
I am thinking it could be a short of some sort. maybe the body got dropped. I don't know - just looking for anyone who may have had this happen to them or has heard of it before.
Thank you in advance for your feedback. Cheers!