Sighta CLOVER 10 - The image does not change; Smudges or blemishes on the screen

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The image does not change
 If the unit enter the freeze mode or playback mode, the image
will not change
 Press power button to check the current status
 Restart the unit
 Hardware Reset
Smudges or blemishes on the screen
 Adjust brightness
 Clean the LCD screen and camera
Please contact your local distributor if problem is not solved.