USB not working / no connection

Hi there, I received the AxiDraw today and was able to get some awesome results.
After unplugging power and USB to relocate the machine to a safer space it is now only powered on.
The USB lamp does not glow and I cannot get a connection from either PC or Mac.
When inserting in the powerplug the pen holder is raised a small fraction, but nothing more moves.

Please advise. Thanks in advance.