first check this, and do next.Charge your Kindle by plugging the supplied USB cable into a power source, such as a computer or the Kindle power adapter (sold separately). A lightning bolt should appear on the battery icon at the top of the Home screen. The indicator light on the bottom edge of the device will turn amber while charging and green when the battery is fully charged. Charging should take less than three hours. You can use your Kindle while it is connected via USB and charging from your computer, by unmounting or ejecting it so that Kindle exits USBdrive mode.
next. if you wanto to chenge your pasrword. we need to reset your kindle.
also you cna see this page that d you and is very important to know it
after.chek this again ok
if you can do this, reset your kind. and charger again. i psible qtha need to make a update about your divece.
hoppe to helpyou and all may reggars