When your tablet is off, blow into the charging hole, then use an open safety pin to dislodge any dust or dirt. Then blow again into the hole. Also ensure that the charger is clean. That should take care of your problem.
It’s time to recognize one of our up and coming leaders on the forums! sathya0403 has earned his Frequent Contributor rank and been steadily increasing his time here. If you've read any of his posts you know he's an asset to all of us. Thanks sathya0403.