I am having this recurrent problem with my Prime. Occasionally it will not charge.
I plugged it into an outlet this morning and it did not give an indication that it was charging. I came back 30 minutes later and my battery dropped below 10%. I undocked the Prime and plugged the charger directly into the bottom of the Prime and it still will not charge.
This happened last week and after some research on the Internet I discovered that there is a fuse within the charger housing that may trip if it gets too hot. So I put the charger in the freezer over night and the following day I plugged it into both the Prime and the dock and it worked.
However, I just took the charger out of the freezer after 2 hours it it is still not working. I have checked the connections and prongs at the connection head and everything looks normal.
What is the solution to this? Is the charger covered under warranty?