I was taking / editing a bunch of photos. I would take a bunch of shots then transfer them from the SD card to the PC, then put the card back in the camera to delete all of the files. After a couple of times of doing that the SD card is not registering when I push it in the port. I put the card back in the camera, just to make sure it wasn't fried somehow, & it's fine. I tried another card & it didn't work either.
This PC did not come with a port for a CF card (for my old camera) so I have one of the card reader hook-ups - I put the SD card in this reader & it's fine.
I restarted the PC & the SD port is still dead.