11-02-2013 01:15 PM
Error 507 means no device software. Did you have the upgraded OS working for a while after the upgrade and then something happened, or did the upgrade process fail and leave you with the error?
At any rate, at this point you should be able to connect the device to desktop manager and install the OS, either the latest or a previous version. To install a previous version, watch for the link to show other versions and then select the one desired.
11-02-2013 03:24 PM
You may also need the use of these tricks:
Good luck and let us know!