I just had this same problem tonight so I tried turning off my tablet completely and tried letting it sit with the cables plugged in while it was off. After about 10 mins I turned it back on just to see if it charged up any because I kept getting the red X over the battery symbol while it was plugged in and turned on. When I turned it back on with the charger still plugged in and letting it sit turned off it came back on and then said that it was charging. Idk if this will work for you or for how long it'll work if it does work for you but for now its working for me when I just now tried it on mine. Good Luck