Clean the USB port?
Cut a Q-tip in half, smoosh it so it'll fit in there, use a little bit of alcohol.
I personally haven't tried this, but I've read about it with other devices and this has been suggested.
(VZW) Galaxy Nexus. Nexus 7.
& Casio G'zOne Commando - I just use this as a game system and waterproof camera
I love this script ==> V6 SuperCharger