I found a solution to this problem that worked for me and my unit is now functioning again <:)

It is a bit random but what i did was - Used a tooth brush and cleaned the contacts on the unit and on the cradle ( accessible by pushing in arm on cradle to bring up contacts ). Jiggled the usb in and out a couple of times on the laptop and made sure the conection was sound. I then deleted the music files on the unit, updated the Media Go software and hey presto, it would switch on so then transfered my music back on PHEW ...All back to normal <:)

I won't be updating it again, i think.

Hope this solution works for others too

Good luck

Destinysheba