HP Scanjet Enterprise 7500 Flatbed Scanner - Manual (Page 44)

The scanner has stopped working correctly
If the scanner stops scanning, follow these steps. After each step, start a scan to see if the scanner is
working. If the problem persists, proceed with the next step.
1. A cable might be loose. Ensure that both the USB cable and power supply are properly
connected.
Use the cable that was included with the scanner. Another USB cable might not be compatible
with the scanner.
2. Ensure that the scanner is receiving power.
a. Check that the green LED on the power supply case is on.
b. If the green LED is not on, ensure that power is available to the power outlet or surge
protector that the power supply is plugged into.
c. If power is available to the power outlet or surge protector but the green LED is still not on,
the power supply might be defective. Contact
www.hp.com/support for assistance.
3. Unplug the power cable from the power source, wait 30 seconds, and then plug it back in.
4. Restart your computer.
5. Use the Add/Remove tool (in Windows Vista, the Programs and Features tool) from the
Control Panel to uninstall the following applications:
● ISIS/TWAIN software
● HP Scanjet Enterprise 7500 Utilities
6. Reinstall using the HP Scanning Software CD that came with your scanner.
7. Reconnect the USB cable and power cable to the scanner, and then press the Power ( ) button
to turn on the scanner.
Scanner operation problems
● Scanner will not turn on
● Scanner keeps turning off
● The LCD is having display issues or scanner buttons are not working as expected
● Scanner does not scan right away
● Scanner scans only one side of a two-sided page
● Scanned pages are missing at the scan destination
● Scanned image is fuzzy
● Scanned pages are out of order at the scan destination
● Optimize scanning and task speeds
● The scan is completely black or completely white
● Scanned images are not straight
38 Chapter 5 Troubleshooting ENWW