I've read the whole tread and the only thing that worked for me was plugging in and out the cable several times slowly just half way in.. Of course it failed during the first attempts, I would still get the red "x"and the annoyng vibrating alert..Then, after several attempts, the vibrating alert was gone and , even though I still got the red x, the sound changed and it was the same as the battery charging one...Boom! Tried 2 more time and now it is working, and I inserted the whole plug after few mins.