UMAX Technologies Astra 2100U - Manual (Page 96)

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Problem:
The following error message appeared: "Scanner not found" or
"Unable to control scanner"
Solution:
Follow this procedure:
1. Confirm the scanner is plugged into the computer’s USB port.
2. Go to the Apple System Profiler, listed under the Apple menu.
3. Go to the Devices & Volumes tab (Command + 2). Verify the
scanner is listed under the USB tree as:
Class: 0
Product ID: 16
Vendor ID: 5638
4. If not, disconnect the USB cable from the computer.
5. Go to Command, Update All Information (Command + U).
6. Reconnect the scanner, and Update All Information again. Is
the scanner listed? If yes, you can begin scanning. If no, please
call UMAX Technical Support.
Try the following solutions, if you are still experiencing
scanning problems:
1. Plug the scanner power adapter directly into the wall outlet and
not in a surge protector.
2. If using a USB hub, plug the scanner directly into the
Macintosh USB port.
3. If you are using an iMac, do not run the scanner off the
keyboard.
4. Download all updates for your Macintosh for USB from the
Apple’s Web site http://www.apple.com