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Standard Repair Process
Error
symptom
Vertical/Horizontal bar, residual image, light spot
☞A6
Check color condition by input
-External Input
-HDMI
☞A15
Check Test pattern
External device screen error-Color error
Check S/W Version
Check
version
S/W Upgrade
Normal
screen?
End
A. Video error
Vertical / Horizontal bar, residual image,
light spot, external device color error
Check external
Y
device
Screen
connection
normal?
condition
N
Replace
module
Check screen
condition by input
-External Input
N
-AV
-HDMI/DVI
Y
N
Y
☞ A7
Check and
Y
replace Link
Normal?
Cable
N
Request repair
for external
device
Connect other external
device and cable
External
(Check normal operation of
Input
External Input, HDMI/DVI
error
by connecting Jig, pattern
Generator ,Set-top Box etc.
HDMI/
DVI
5
Established
date
Revised date
N
Screen
Replace Main B'D
normal?
Y
for LGD Panel
Replace Main B'D
End
Screen
normal?
Request repair for
external device
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.
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Only for training and service purposes.
5/15
Replace
Module
N
Screen
normal?
Y
End
N
Replace
Main B/D /
Module
Y
Y
N
Replace
Main B/D /
Module
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