Screen
normal?
N
YCheck external
device
connection
condition
Y
N
Check and
replace Link
Cable
Normal?
Y
N
Screen
normal? Replace Main B/D
(adjust VCOM)
Replace
module
Check color condition by input
-External Input
-Component
-RGB
-HDMI/DVI
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

☞A12

External device screen error-Color error
External
Input
error 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.
N
Y
Replace
Main B/D
Screen
normal?
Check screen
condition by input
-External Input
-Component
-RGB
-HDMI/DVI
Request repair for
external device
Component
error
RGB
error
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
Screen
normal?
N
Y
Check S/W Version
Y
N
Check
version
S/W Upgrade
Y
N
Normal
screen?
End
Y
N
Replace Main B/D

For LGD panel

Replace
Module
Screen
normal?
End
Established

date

Revised date 5/13

LCD TV Error
symptom
Standard Repair Process

☞A8 ☞A10/ A11

Check Test pattern

☞A28

For other panel

2010. 12 .14
Copyright © 2012 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only