ViewSonic N3252w-1M Service Manual page 33

F. Under DTV MODE, checks whether the action of SPDIF is right.
G. AUDIO OUT FUNCTION TEST: Under all patterns except PC pattern, The Audio
output meets active extra speaker, examines whether the extra speaker makes the sound.
1.4.10 EARPHONE FUNCTION TEST
Under PC MODE, input PC AUDIO signal, determines whether the action of INT
SPEAKER output is right. Meets earphone with the EARPHONE, Determined whether the
action of EARPHONE output is normal.
1.4.11 All Modes Reset
After final QC step, we must to erase all saved changes again and restore the factory
defaults.
You should do "All Mode Reset" again.
Turn off the LCD TV by pressing "Power" button.
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N3252w-1M