Check the paper feed path and ensure there is nothing blocking the feed path.
If the feed path is clear and the issue remains, perform the following steps:

• Your document is not set correctly.

   

  Insert your document until you feel the top edge of the document touch the inside of your scanner.

   

• Your document is too thin or too thick.

   

  Check that your document is acceptable.

   

  > Click here to see detail of suitable document.

   

  If your document is not the issue:

   

  1. Confirm that the USB cable connecting your scanner to your computer is properly connected.
      
  2. Re-install the scanner driver from the DVD-ROM.

   

• The scanner's top cover is open.

   

  Close the top cover and start scanning again.