NG-MB1/NG-MB2 User Manual
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2. Then go to [Auotest] and press <M/OK>. The interface appears as shown below:
Test All: The device automatically tests the LCD, Voice, Keyboard, Face,
Fingerprint and Clock RTC, press <M/OK> to continue and press <ESC> to exit.
Test LCD: The device tests the display effect of LCD screen by displaying full color,
pure white, and pure black to check whether the screen displays colors properly.
Test Voice: The device automatically tests whether the voice files stored in the
device are complete and the voice quality is good.
Test Keyboard: Checks if the keyboard is available.
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