LG 75UN8100PTB Service Manual page 28

Standard Repair Process
Error
symptom
☞A6
Check color by input
- External Input
- Component/AV
- HDMI
☞A28
Check Test pattern
A. Video error
Color error
☞ A7
※ Check and
Replace Link
Cable
Y
Color
(EPI/CEDS
error?
or Vx1 Cable)
and connect
N
condition
Check error
color input
mode
External Input/
Component/AV
error
HDMI
error
Established
Revised date
Y
Color
Replace Main B/D
error?
N
External
Check external
device/cable
device and cable
normal
Request repair
for external
device/cable
External
Check external
device/cable
device and cable
normal
4
date
Y
Color
Replace module
error?
N
End
Y
Replace Main/T-con B/D
N
N
Y
Replace Main/T-con B/D
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