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.

  
  

• The scanner is turned off because the auto power off function is active.

  Press Power to turn on the scanner.

  
  

• You are operating the settings menu. (SD mode only)

  Get out the settings menu to put the scanner into standby mode.

  
  

• No SD card is inserted in the scanner's SD card slot. (SD mode only)

  Insert an SD card into the scanner's SD card slot.