I've got the same problem but my N7 has previously been repaired at an electronics shop costing £80. Since then the speakers have become dodgy, the USB was dodgy and now won't work at all. I've never repaired anything before but it looks like the USB component had been pushed too far in making it impossible for the cable to go all the way in. Do you think I'll have to replace the component or is there a way of bringing it back down? I think the component probably works fine, its just in the wrong position. Any thoughts? Thanks.