Plustek All in One Printer 820 User Manual

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Appendix A: Troubleshooting 
Scanning Problems 
Most problems are easily solved, and some of the most common questions and 
their recommended solutions are listed below.  
 
Symptom: 
After following the installation instructions, my computer cannot 
find the scanner. 
Cause 1: 
Your software may have not been successfully installed. 
Solution  1: 
Please insert the CD-ROM and reinstall the scanner software. Follow the 
on-screen instructions carefully when installing the software. 
 
Cause 2: 
Some aspect of your computer system does not support USB. 
Solution 
 
2: Download and execute the file USBREADY.EXE at 
http://www.usb.org/faq.html to determine the level of your computer’s 
USB support. 
 
Cause 3: 
USB is not enabled in your BIOS settings. 
Solution 3: 
Enable the USB controller in your BIOS settings. This is typically done 
by pressing a key
 
(usually <del>, <F1> or <F10>) during startup. In the 
BIOS Settings screen that appears, find the option for USB and enable 
it. Exit and Save the changes you made. Your computer is rebooted 
automatically.  Please consult your computer vendor before attempting 
to do this change. 
 
Cause 4: 
The USB controller was improperly installed on your computer. 
Solution 4: 
To reinstall the USB controller, click on the Start button, choose Settings 
and select Control Panel. In the window that opens, double-click on the 
Add New Hardware icon. Carefully follow the instructions that appear on 
your screen. 
 
Symptom: 
The scanned image looks grainy on the screen. 
Cause: 
Your video mode is not set to show more than 256 colors. 
Solution: 
We recommend that you set your video mode to 16 bits per pixel (65536 
colors) or higher.  Please consult your video card, computer or Windows 
documentation to change the video mode. 
 
Symptom: 
The scanner scans very slow. 
Cause 1: 
You are running other applications in the background. 
Solution1: 
Close all the other applications that are running in the background. 
                                                 
4
 
Please consult your computer manual on how to modify your BIOS/CMOS settings
 
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