Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
I hope this helps: if you did such a full reset that your books, the downloaded copies on your Kindle device, were wiped off it, then you probably have a Kindle that isn't sure who it belongs to, and is in factory-release condition.
The first thing to try then, is to see whether just going to
on your Kindle, and registering it to one of your 2 Amazon.com account (and decide which one is best first, and also be sure as to which account your password ***** ***** for, period.)
After that... if the password ***** period, after several tries, you may have to have your password ***** using a computer or some other smart device and not your current Kindle.
Then once you are sure you are logging in to your Amazon.com account (the one you want to re-register your Kindle to) on the computer or other device that isn't your current Kindle, then try logging in, carefully, on the Kindle to re-register it, and observing the difference between UPPER-CASE and lower-case letters, which is vital to a password ***** properly.
Let me know how it turns out. I'd like to see this case through to a good conclusion.
(Note: when doing a reset of an Amazon.com account, be sure you do not hurry the process. If you expect the reset to work instantly, you are expecting wrongly: it may take at least 10 minutes to propagate through Amazon's servers, and then work ... password ***** seem to not work, when one does not give them a little time to work. Computers are fast, but not infinitely fast, if you know what I'm saying.)
So let me know how it goes, please. Thanks.