LG 55UF6790 Service Manual page 87

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.
3. If you can`t see the UHD live TV, please connect signal at left side of jack. (Korea model only)
Copyright 2015 LG Electronics Inc. All rights reserved.
Only for training and service purposes
Error
A. Video error_Video error, video lag/stop
TUNER checking part
Established
date
Revised
date
A5
2015.5.25
A5
LGE Internal Use Only