[SOLVED] CDJ 900 Updating Firmware Issue

I recently purchased two CDJ 900s.  One had version 4.05 firmware, the other 2.0.

I downloaded 4.2 and updated the 4.05 CDJ with no issues.  When I try to repeat the process for the CDJ with 2.0, it does not update.  After holding USB and Reloop I get the message to insert my USB.  I insert the same USB that I used to update my other CDJ.  I get the "Now Updating" blinking light, along with the Auto Beat Loops blinking, after a minute or so my screen reverts to just the PIONEER logo.  Nothing else happens.  I have tried to let that sit for an hour, no updates.  I have powered off, unplugged the CDJ, ensured no link etc was plugged in - same issue everytime.  Like I said, it worked fine of the other CDJ.  I have read that you can go from 2.0 to 4.2 - but I cant think of anything else that could be the issue.....any help is appreciated.

Thanks