My friend bought a used Kindle paper, it worked perfectly for a month, even bought books for it. Then randomly bricked.

The same happened to me, but with a Kindle fire stick. I loved how nice it looked on my old led tv, even better in my more modern led monitor. The only device i could actually stream at 1080p without image downgrade. It didn't last 6 months, stuck in a bootloop and i have no idea on how to troubleshoot. Never again.