I saw a posting of a lady here, old forum, that even after the update 1.02 the SD card problems remains.
I tried several SD class 10 card and until now, i made the update, the error no card inserted, stays from time to time.
My Nikon is almost brand new, 3 moths old.
I used 3 class 10 cards and the 2 most expensive were destroyed during a video session
Sandisk Extreme class 10 45 MB/s 32GB
Just the led, green light, started to burn all the time and the camera would not start.
I put inside, not to lose the live music video session a cheaper Intenso class 10 card and the D5100 started again to work normal.
Coming home later that day I inserted the SanDisk in my laptop but the PC would not recognize the card!
Brought it to the service here but they could not recover the video files.
Got a new one but after a month or so the same thing happened again with a brand new SanDisk 32GB, now I am with a new (3rd) Sandisk
Before selling my Nikon, I love the machine, a question if this could be a error of SanDisk and I just have been very unlucky? Or a Nikon internal hardware problem?
I had a Canon Rebel mark 1 before and never had any related problems.
What I have done so far:
Made a format inside the D5100
Updated the firmware with: D5100_0102.bin
But still from time I have the issue related to the old firmware that there is no card inserted.
I hope someone can solve this mystery before I am forced to get another DSLR