LG 47LA790V Service Manual page 111

Standard Repair Process Detail Technical Manual
symptom
LCD TV
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
Error
A. Video error_Video error, video lag/stop
TUNER checking part
Established
date
Revised
date
59 / 90
2012. 12 .06
A9
LGE Internal Use Only