Useful info for ConnectKey products, may be applicable to other US based devices... (Also known to work on some Fuji products as well)
Press  (zero) and hold for ten seconds
Whilst still holding down , press the [Start] button
A box will appear on the device screen, enter  or  (see details below for each description)
Tools mode will then become active
Access to both CSE and full diagnostics mode can be accessed via the Web UI. Once diagnostic access to remote UI is enabled, login into CWIS with username: diag and password: 3424. Once the remote session is active, you will have an additional 'service diagnostics' button. Press this and then logon using the normal passcodes:
CSE - 2732 (bypasses lock screen and gives limited access to tools)
Diagnostics - 6789 (engineer access to diagnostics, including test pages and NVM stuff.
While in Diagnostics, access the following menu to disable SafeCom login
If the default admin/1111 has been changed, you may be left with performing an ALTBOOT with FORCED_UPDATE and NO_DATA_BACKUP
Additional Information (UNCONFIRMED)...
/ 9301 etc locked by Safecom
Press all 3 at the same time # * (stop/red button) and keep held down
Will then ask for pass code, which is
1991 press enter