Evelyn fears she's broken her camera because her SD cards can't be read. Leo suspects that she pulled out the card while it was writing and it damaged the reader in the camera. She may be able to reset the camera, which she can find information for in the manual. That could bring it back to default settings, which could solve the problem. She could also download the firmware for the camera and reflash it.
It's pretty old at 15 years, but if she can get it, it's worth a try. She should really just keep the lenses and get a new camera. She'll be able to get one that's much better than that old camera.