[mike626]

Here is something to check if your phone has stopped charging while turned on:

Click on the battery icon at the top of the screen.
Choose the battery icon from the list of available settings panels.
Under the battery indicator bar there is a checkbox that reads: "When device is turned on, do not charge the battery when connected to a PC."
Ensure that the box is unchecked.

This won't help with the overheating issue, but if the box was accidently checked at some point, the phone will not rechage if it is on and connected to a PC.