LG 26LH1DC1-UB Service Manual page 26

4. No Sound
Symptom
Front LED is ON as green color, but no sound.
Check Flow
Check Speaker Cable?
Audio Voltage +12V normal?
Audio normal on HDMI?
Audio normal on Analog RF?
Audio normal on Video3?
Audio normal on DIGITAL RF?
AutoCamport/AV2
Check RJP Mode
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Only for training and service purposes
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Audio normal on
YES
Is the SPK cable connected well?
YES
Replace Speaker Cable
Check Power Supply
YES
Audio normal on DIGITAL RF?
YES
Check EDID EEPROM
Check MSP3425
Check TEA6422D
Check TUNER
Check TEA6422D
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NO
Reset Cable
NO
Check STA323W
LGE Internal Use Only