LG 40LF6300-UA Service Manual page 97

Standard Repair Process Detail Technical Manual
Error symptom
Content
<ALL MODELS>
Checking method:
1. Check the signal strength or check whether the screen is normal when the external device is connected.
2. After measuring each voltage from power supply, finally replace the MAIN BOARD.
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Only for training and service purposes
A. Video error_Video error, video lag/stop
TUNER checking part
Established
date
Revised
date
A9
LGE Internal Use Only