First Blog post and its about a Kindle..
Anyway, One of the Kindles in my household is a 4th Gen Kindle (non-touch) which suddenly stopped charging. After looking around briefly on the Internet i found this which is taken from a Kindle Guide
“My Kindle won’t turn on/My Kindle is unresponsive or appears frozen”
1.Disconnect your Kindle from any power source.
2.Slide/Push and hold the power switch for 15 seconds, then release.
3. The screen will be blank for about 30 seconds while your Kindle restarts.
This forced a Reboot and suddenly it started to charge again.