nano power off usb not working

I just bought a nano 3.0 from gravitech and could not get it to be seen in dmesg and no lights. I powered it up externally and leds lit up so I connected the usb cable and it is seen. Did I just get a defective unit? The same cable powers a picdem2 just fine, so I don't think it is the cable.

Anyone else see this issue with the nano 3.0