Hi, my name is ***** ***** I will do my best to assist you.
That model of scanner first sold in 2004.
Did you pick this scanner up used, or have you had it and worked with it for some time?
What you describe, sounds to me like either your timing belt has snapped, or its so worn out that its not turning the scan motor. Heres where you can order a replacement belt.
Now, heres the tough part.. Replacing it. Theres no service manual I can find available for that model.
Its possible that a careful technician or even average joe could open the scanner and replace the belt. Its not the easiest replacement in the world as to get the belt in place the machine has to be almost completely dismantled. And then put back together correctly.
The issue is repairable though, and the part isnt too expensive considering the retail value of the scanner.
If you let me know your zip code, I could probably find a repair shop that could handle the replacement.
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Senior Technician and Network Switching Systems Operator / Maintainer.