The device does not turn on 
Possible cause 
The battery is completely discharged. 
Solution 
Charge the battery. 
 
The device does not operate from an external power 
source 
Possible cause 
The USB cable is damaged. 
Solution 
Replace the USB cable. 
 
Possible cause 
The external power supply is discharged. 
Solution 
Charge the external power supply (if necessary). 
 
Blurred image with vertical stripes or an uneven 
background 
Possible cause 
Calibration is required. 
Solution 
Perform image calibration according to the Calibration Mode section of the 
manual.