HP 175X - JetDirect Print Server User Manual page 54

A solid green USB LED
illustrated above.
If your LEDs are not solid green, see
5. Verify the connection with the printer by printing a configuration (test) page:
Briefly press and release the test button
soon emerge from the attached printer.
Interpreting the configuration page and diagnosing problems
If the page does not appear on the printer, or if it is unreadable,
and then return to this User's Guide to continue with the installation.
on the top front indicates a good USB-II connection, as
interpreting the LEDs and diagnosing problems
on the rear end of the print server. The page should
go to this Troubleshooting page,