Interesting. When mine seemed to freeze, it also did not light the LED. I solved my problem by a total charge with the adapter, not the USB. I did note that it took quite some time before the LED lit orange during the charge cycle, so perhaps you did not wait long enough. I charged it until it was a full (green) charge before trying to control it. As I recall, the screensaver did appear some time after starting the charge. The charge rate should not be any different between the adapter and the USB power sources.
There are long threads here about the possible causes of this freeze. The latest and best is that when using the unlighted Kindle cover, the cover hooks are coated with paint. In the winter especially, heat dries out the air and increases static buildup which can cause problems with the Kindle. Since the paint on the hooks act as a partial insulator, the static charge may build up and then arc into the Kindle causing the lockup.
The current thinking is that you can either blank the screen (5-seconds on the power switch) before inserting the cover hooks, OR scrape paint from the hooks which decreases static buildup. In any case, if you go the blank screen route, do not use the Kindle in the unlighted cover. If you like the cover on, try scraping the hooks before using it in the cover. It is also a good idea to touch something to discharge yourself after walking across the room and before picking up any electronic device.
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