HP Scanjet 3400c. This always worked when I used Windows 95, then Windows ME, but since I have started using Windows XP I have found it impossible to get this to work. Have installed with original install CD, with latest HP XP specific drivers, have installed via setup.exe and through add hardware/device manager but when launching Precision Scan LTX I am told - 'Scanner not found' the scanner is properly plugged in via power and usb and is lit up ready to go. When getting info on it from the scanners/cameras folder in my comp I have: Status - Unavailable. Occasionally windows gives me a pop up of a 'usb device malfunction' so I have tried using various cables but still the same result, so where am I going wrong? Does this sound like a genuine XP problem or a hardware problem?

Just wondering if you plugged the scanner in before the install told you to. If you jump the gun and plug the scanner in first, especially with HP, you're going to run into this problem. Today seems like a good day to chew through the restraints.

I had this problem recently when moving a similar HP 3400c scanner from one machine to another. In the end the W2K drivers did not work correctly under XP and I down loaded the XP specific drivers after uninstalling and then also sorted out the programme associations so that it operated from the desktop on a new icon and all was well. The issue seems to be in the Twain setup and was complicated by my having two scanners on one PC. It seems that you can't do that. J