HP Scanjet Enterprise 9000 Sheet-feed Scanner - Manual (Page 29)

Check the USB connection
Check the physical connection to the scanner.
• Use the cable that was included with the scanner. Another USB cable might not be
compatible with the scanner.
• Ensure that the USB cable is securely connected between the scanner and the
computer. The trident icon on the USB cable faces up when the cable is properly
connected to the scanner.
If the problem persists after verifying the above items, try the following:
1. Do one of the following tasks depending on how the scanner is connected to the
computer:
•
If the USB cable is connected to a USB hub or a docking station for a laptop,
disconnect the USB cable from the USB hub or the docking station, and then
connect the USB cable to a USB port on the back of the computer.
• If the USB cable is directly connected to the computer, plug it into a different USB
port on the back of the computer.
• Remove all other USB devices from the computer except for the keyboard and
the mouse.
2. Press the Power switch to the off position, wait 30 seconds, and then press the
Power switch to the on position.
3. Restart the computer.
4. After the computer has restarted, try using the scanner.
•
If the scanner works, reconnect any additional USB devices one at a time; try the
scanner after connecting each additional device. Disconnect any USB devices
that prevent the scanner from working.
• If the scanner does not work, uninstall and then reinstall the HP Scanjet drivers
and utilities.
Check that the scanner has power
The power cable is connected between the scanner and a power outlet.
• Ensure that the power cable is securely connected between the scanner and a live
electrical outlet.
• If the power cable is connected to a surge protector, ensure that the surge protector
is plugged into an outlet and turned on.
If the problem persists after verifying the above items, follow these steps:
1. Press the Power switch to the off position, and then disconnect the power cable from
the scanner.
2. Wait 30 seconds.
3. Reconnect the power cable to the scanner, then press the Power switch to the on
position.
Reset the scanner
If you receive an error message similar to Scanner initialization failed or Scanner not
found when trying to use the scanner, you should reset the scanner.
Scanner initialization or hardware problems 27