Yarr, I had two Kobo Klara HDs which died on me on the space of a year. During that time I also may have used libgen. Is it possible that was the cause of the failure? Cheers,
Edit: The consensus is that it is very not likely the case. I wanted to check if it was a skill issue so I could learn from it. Seems not to be the case. Stay safe either way.
An epub is just an archive containing text files, css files, and images, there nothing in there that can damage hardware. It’s possible you just ran into a bad batch of kobo’s