## General Usage and Information

- Power Save mode is the factory default for the scanner. In Power Save mode the scanner lamp should timeout and turnoff after a period of inactivity (about 15 minutes). For faster initial scanning, turn on the Instant Lamp Warm-up feature. To switch Instant Lamp Warm-up on or off, use the General Info tab of the Button Settings Utility. When the lamp is off, “—“ is displayed on the LCD

- For most document scanning from third party applications, HP recommends selecting the HP Scanjet 7800 Document TWAIN source over others sources such as WIA. The HP Scanjet 7800 Document TWAIN has better support for duplex and document scanning.

- HP Smart Document Scan Software, Kofax VRS, and Captiva QuickScan software require the ISIS drivers to be installed before the applications can scan with the scanner.

## Accessibility Utilities

### Button Disable Utility

To prevent buttons from being accidentally pushed, you can use the Button Disable Utility to disable the buttons. You can use the same utility to re-enable the buttons. To use the Button Disable Utility, complete the following steps:

1. On your hard drive, navigate to <Install drive>:\Program Files\Common Files\Hewlett-Packard\Scanjet\7800\hpbdu.exe.

2. Double-click hpbdu.exe. The HP Button Disable Utility dialog box is displayed.
3. Select the scanner, and then click Enable Buttons or Disable Buttons.

### LCD Reader

The LCD Reader is a software program that displays the contents of the scanner's LCD on your computer screen. It utilizes accessibility tools installed on your computer to read what is being displayed on the LCD.
To use the LCD Reader, follow these steps:

1. On your hard drive, navigate to <Install drive>:\Program Files\Common Files\Hewlett-Packard\Scanjet\7800\hplcd.exe
2. To start the program, double-click hplcd.exe

## Troubleshooting

Scanner enumeration from USB ports located on front of PC

On some brands and models of computers, the USB ports located on the front of the PC are susceptible to electrical noise that prevents the scanner from enumerating or causes communication errors. HP recommends always using the back USB ports to avoid USB communication problems.

Troubleshooting installations of Captiva ISIS drivers

The demo version of Captiva QuickScan Pro can be used to test the ISIS driver connectivity. Insert the HP Specialized Document Scanning Software CD and run the setup.exe file located in the QuickScan Pro 30-Launch Demo\QuickScan folder.

The Captiva QuickScan Pro demo can be used for verifying proper installation of the ISIS/TWAIN drivers.

Error Messages

If you receive a scanner communication error or other unknown error, be sure the scanner hatch is securely fastened on both sides. Open and close again firmly to ensure closure. If communication or initialization errors still exist, cycle the power to the scanner using the power switch located on the back of the scanner.