Anyone having issues with their dock no longer charging? With my Prime connected to my cable, and it'll "ping" and the batt icon will indicate its charging. With the tablet and dock connected, nothing happens when I plug in the dock. The dock led blinks a few times (amber), and never goes steady. I can use the dock keyboard fine, but the tablet never indicates it or the dock are charging. Tablet battery is 61% dock is at 0%. Any suggestions?