When an error occurs, the scanner stops scanning and the Error and Power lights indicate the error type.
Make sure your scanner’s AC adapter is securely connected to the scanner and a working electrical outlet.
Make sure the electrical outlet works. If necessary, test it by plugging in another electrical device and turning it on.
Make sure the scanner is turned on.
Turn off the scanner and computer, then check the interface cable connection between them to make sure it is secure.
Use the USB cable that came with your scanner.
Connect the scanner directly to the computer’s USB port or through one USB hub only. The scanner may not work properly when connected to the computer through more than one USB hub.
If you are using any TWAIN-compliant program, make sure that the correct scanner is selected as the Scanner or Source setting.
If you upgraded your computer’s operating system, you need to reinstall Epson Scan. Uninstall Epson Scan as described in Uninstalling Your Scanning Software, then reinstall it as described on the Start Here sheet.
For Windows only:
Make sure your scanner’s name appears under Imaging device without a (?) or an exclamation (!) mark in the Device Manager window. If the scanner’s name appears with one of these marks or as an Unknown device, uninstall Epson Scan as described in Uninstalling Your Scanning Software, then reinstall it as described on the Start Here sheet.
Make sure your scanner software is installed as described on the Start Here sheet.
Windows: Click the Events tab in your scanner’s Properties window and make sure Take no action is not selected. Also, make sure the Start Button is selected in the Select an event list box, and Start this program is selected. For details, see Assigning a Program With Windows 8, Windows 7, and Windows Vista or Assigning a Program With Windows XP.
Mac OS X: Make sure you are logged on as the user who installed the scanner software. Other users must first start Epson Scanner Monitor in the Applications folder and then press the Start button to scan.