I can't start Epson Scan in Windows or on my Mac. What should I do?

• Try the following:
  • 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 or one that matches the specifications defined in USB Interface.
  • 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. First, uninstall Epson Scan as described in Uninstalling Your Scanning Software, then reinstall it as described on the Start Here sheet.
  • If you're using Windows, make sure your scanner's name appears under Imaging devices 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 Epson Scan, then reinstall it as described on the Start Here sheet.
  • In Windows, make sure your computer supports USB by following these steps:
    1. Do one of the following:
       
       Windows 8: Navigate to the Start screen, right-click the screen, and select All apps. Then select Control Panel. Click System Security and then System.
       
       Windows 7: Click the   Start button icon and select Control Panel. Click System and Security and then System.
       
       Windows Vista: Click the   Start button icon and select Control Panel. Click System and Maintenance and then System.
       
       Windows XP: Click Start and select Control Panel. Double-click the System icon.
    2. Do one of the following:
       
       Windows 8 or Windows 7: Click Device Manager.
       
       Windows Vista: Click Device Manager, then click Continue in the User Account Control window.
       
       Windows XP: Click the Hardware tab, then click Device Manager.
    3. Scroll down and double-click Universal Serial Bus controllers.
       
       If USB Universal Host Controllers and USB Root Hub are listed, Windows supports USB.
    4. Try scanning again.