LG 55EC9300 Repair Manual page 66

Standard Repair Process Detail Technical Manual
LCD TV
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. 2 Aft
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Only for training and service purposes
Error
A. Video error_Video error, video lag/stop
symptom
TUNER checking part
Content
i h lt f
Established
l fi ll l th MAIN BOARD
A5
2013.01.31
date
Revised
date date
A5
LGE Internal Use Only