This indicates a scanner failure. Please power off the unit and return it for repair.

The scanner has entered the sleep mode. Place an item within the scanner's motion detecting area and move back and forth or left and right to wake up the scanner.

The scanner would automatically run the self-test when the power is supplied. It is to verify that the scanner and interface are functioning properly and takes only seconds. The unit would give four beeps in series to indicate that the scanner passed self-test; blue LED would light on afterwards. If the scanner fails the self-test, both the blue and red LED would light on (appearing the color purple); a continuous beeping may also be heard.