The Scanner Software Does Not Work Properly - Epson Expression 1680 Reference Manual

For SCSI interface users, make sure the scanner's SCSI ID and
terminator are set correctly. See your online Setup Guide for
details on making these settings.
For SCSI interface users, if you have other expansion boards
in your computer, make sure that their interrupt settings are
not interfering with your SCSI board. See your computer's
documentation for details.
For USB interface users, try connecting the scanner directly to
the computer's USB port, or use an EPSON USB cable.
For USB interface users, try connecting your scanner to a
different port on your hub, or to a different hub.
For Macintosh and IEEE 1394 interface users, make sure that
the following Extensions are selected in the Extensions
Manager: EPSON FW Scanner Enabler; EPSON FW Scanner
Expert; and EPSON FW ScannerLib.

The scanner software does not work properly.

Make sure your software is installed correctly.
For Windows Millennium Edition, 98, and 2000 users, check
if your scanner is listed more than once in the Scanners and
Cameras Properties dialog box. To view the dialog box, click
Start, point to Settings, click Control Panel, then double-click
the Scanners and Cameras icon.
If EPSON Expression1680 appears more than once in the list
of installed devices, follow the instructions in "Uninstalling
the Scanner Software for Windows" in Chapter 3 of the online
Setup Guide to remove it completely from the dialog box. Then
follow the instructions in "Installing EPSON TWAIN Pro for
Windows" in Chapter 3 of the online Setup Guide to reinstall
EPSON TWAIN Pro.
Make sure your computer meets the memory and other
system requirements specified for the software you are using.
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Maintenance and Troubleshooting