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LG 24LM520S-WU Service Manual page 17

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Standard Repair Process
Error Symptom
Content
☞A7
Check color by input
- External Input
(COMPONENT/AV/HDMI)
☞A10
Check Test pattern
A. Video Error
Color error
☞ A8 / A9
Check and
replace Link
Color
Y
Cable
error
(LVDS) and
contact
N
condition
Check error
color input
mode
External
Input
Compon
ent,
HDMI
error
Color
Y
Replace Main B/D
error
N
Check external
device and
cable
Established date
Revised date
Y
Color
Replace module
error
N
End
External
Y
device/
Replace Main B/D
Cable
Normal
N
Request repair
for external
device/cable
Copyright © 2019 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
4/13

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