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LG OLED77G3 Series Service Manual page 30

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Standard Repair Process
Error
symptom
☞A6
Check color by input
-External Input
-AV
-HDMI
A. Video error
☞ A7
※ Check and
replace Link
Y
Cable
Color
(Vx1 Cable)
error?
and contact
N
condition
Check error
color input
mode
External Input/
Component
error
HDMI
error
Color error
Y
Color
Replace Main B/D
error?
N
Check external
device and
cable
Request repair
Check external
device and
cable
4
Established
date
Revised date
Y
Color
Replace module
error?
N
End
External
Y
device/Cable
Replace Main B/D
normal
N
for external
device/cable
N
Y
External
Replace Main B/D
device/Cable
normal
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