Screen
normal?
N
Y
Check external
device
connection
condition
Y
N
Normal?
Y
N
Screen
normal?
Replace Main B’D
Replace
module
Check color condition by input
End
Vertical/Horizontal bar, residual image, light spot
Request repair
for external
device
A. Video error
Vertical / Horizontal bar, residual image,
light spot, external device color error
External device screen error-Color error
External
Input
error
Connect other external
device and cable
(Check normal operation of
External Input, HDMI/DVI
by connecting Jig, pattern
Generator ,Set-top Box etc.
N
Y
Replace
Main B/D /
Module
Screen
normal?
Check screen
condition by input
-External Input
-AV
-HDMI/DVI
Request repair for
external device
HDMI/
DVI
Connect other external
device and cable
(Check normal operation of
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
Replace
Main B/D /
Module
Screen
normal?
N
Y
Check S/W Version
Y
N
Check
version
S/W Upgrade
Y
N
Normal
screen?
End
Y
N
Replace
Module
Screen
normal?
End
Established
date
Revised date
5/15
Error
symptom
Standard Repair Process
☞
A6
5
☞
A15
Replace Main B’D
for LGD Panel
Copyright © 2017 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Summary of Contents for 55EG9A7V
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