LG OLED48C3 Series Service Manual page 30

Standard Repair Process
Error
symptom
Vertical/Horizontal bar, residual image, light spot
☞A6
Check color condition
by input
-External Input
-HDMI
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
Screen
device
normal?
connection
condition
N
Replace
module
Check screen
N condition by input
-External Input
-Component
-HDMI/DVI
Y
N
Y
☞ A7
Check and
Y
Normal? replace Link
Cable
N
Request repair
for external
device
Connect other external
External
Input
device and cable
error
(Check normal operation of
External Input, HDMI/DVI
by connecting Jig, pattern
Generator ,Set-top Box etc.
Connect other external
device and cable
(Check normal operation of
HDMI/
External Input, HDMI/DVI by
DVI
connecting Jig, pattern
Generator ,Set-top Box etc.
5
Established
date
Revised date
N
Screen
Replace Main B/D
normal?
Y
End
Screen
normal?
Request repair for
external device
Screen
normal?
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Replace
Module
N
Screen
normal?
Y
End
Replace
N
Main/T-con
B/D
Y
Y
N Replace
Main/T-con
B/D