Lets try a master reset. I want you to try this first with the device connected to the computer.
If you can get the reset to process then it should continue working normally. If it doesn't work while plugged in, please repeat the process without it being plugged in.
By the way, I see that you had to wait quite a bit for help. I am sorry about that.
Please give this a try and let me know how it works for you. If this solves the problem, would you mind taking a moment to rate my service? I'd really appreciate it! Without a rating I am not credited for my answer. If this doesn't solve the problem be sure to let me know so we can continue troubleshooting.
I am about to logoff for the evening but I will check back with you in the morning. Have a good night!