HP 9600 Series - Manual (Page 80)

ENWW 6-5
USB installation failed or nothing prints through USB
Make sure your computer has a USB port and is properly configured to use a USB
connection.
Make sure your operating system supports USB connection, such as Windows 98, Me,
2000, or XP. Windows NT 4.0 does not support USB connection.
Make sure the USB cable is properly connected to the computer and the printer.
Make sure the printer is turned on.
Restart the system and send the print job again.
Connect the USB cable to the computer and printer and turn on the printer. Verify that
Windows is able to detect the printer. Windows will display the Found New Hardware
wizard if it detects the printer.
If the installation failed, uninstall the printer software and try to install again. See
“Uninstalling the printer software” .