Thank you for the information.
Based on age alone, the kindle is past its service life, and all symptoms here after attempting these resets would confirm a hardware fault, at minimum a bad battery, which would have to be replaced.
It can be fixed, but for a kindle this age is not going to be practical to do so. It is about $40 for a kit to buy a new battery, if you are comfortable taking the kindle apart to replace it yourself, if taking it to a repair shops, it will be twice that. You can buy a brand new and updated model with a fresh warranty for as little as $50: http://amzn.to/2c90dxH
If you prefer to repair, I can help you with finding the proper battery, but I would recommend replacing it at this point.
When you receive your replacement kindle, once it is registered and connected to wifi, all of your existing books/purchases will sync to the new kindle, so you won’t lose any of the content you’ve previously purchased.
Best regards, ***** ***** for the news,