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Standard Repair Process
LCD TV
Vertical/Horizontal bar, residual image, light spot
☞A6
Check color condition by input
-External Input
-Component
-HDMI
HDMI
A8
☞A8
Check Test pattern
External device screen error-Color error
Check S/W Version
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Only for training and service purposes
Error
symptom
Vertical / Horizontal bar, residual image,
light spot, external device color error
Check external
Y
Screen
device
normal?
connection
condition
N
Replace
module
Check screen
condition by input
-External Input
N
Check
-Component
version
-HDMI/DVI
Y
S/W Upgrade
N
Normal
screen?
Y
End
A. Video error
☞ A7
Check and
Y
replace Link
Normal?
Cable
Cable
N
Request repair
for external
device
External
Input
error
Component
error
HDMI/
DVI
5
Established
2013.01.31
date
Revised date
Revised date
N
Screen
Replace Main/T-con B/D
normal?
(adjust VCOM)
(adjust VCOM)
For LGD panel
Y
Replace Main B/D
End
For other panel
Connect other external
device and cable
Screen
(Check normal operation of
normal?
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
Request repair for
external device
Connect other external
device and cable
Screen
(Check normal operation of
normal?
normal?
E t
External Input, Component,
l I
t C
t
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
5/16
5/16
Replace
Module
Module
N
Screen
normal?
Y
End
N
Replace
Replace
Main/T-con
B/D
Y
Y
N
Replace
Main /T-con
Main /T-con
B/D
LGE Internal Use Only
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