Hello, I seem to have a problem that it a bit different form the current threads about charging. Several months ago I finally upgraded to the latest OS, only to find that I didn't like it. So, after some digging, found out how to go back to the original 4.1.2. Everything is fine and the Tablet is nice and responsive. BUT, it now seems that the Tablet won't charge when OFF, the screen lights up and the battery drains. When the Tablet is ON, no problem. I am using the original cable and charger. Any thoughts?