LG 47LB5800 - Check Power Input Voltage and ST-BY 3.5 V

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Only for training and service purposes
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MENU  support  signal test
 select channel
When the signal is strong, use the
attenuator (-10dB, -15dB, -20dB etc.)
Standard Repair Process Detail Technical Manual
TUNER input signal strength checking method
A. Video error_Video error, video lag/stop
<ALL MODELS>
A6
Established
date
Revised
date
Error
symptom
Content
LCD TV
2013. 12 .06