to fix my tab i open the it and i exchange the battery with my cousin tablet which is also not working not charging and cannot open..i changed my battery with her and there is goes its charging...but after some days it goes back again its easily low bat and charge a 100% but when i unplug it,low battery again..then i decided to buy a new usb cable for my charger..and now its working and not easily low battery..i thought my battery have a problem but its my usb cable.i also tried the push the power for battery reset..its working but after still coming back to the prob...only the new usb cable is the answer..