LG 86UH9500 Service Manual page 105

Standard Repair Process
Error
symptom
☞A6
☞A8
Check color by input
-External Input
-COMPONENT
-AV
-HDMI
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Only for training and service purposes
A. Video error
☞ A7
※ Check the V
Y
x1 or EPI Cable
Color
Check
and Connector
error?
Test pattern
And Replace
Link Cable
N
Check error
color input
mode
External Input/
Component
error
HDMI
Color error
Y
Color
error?
N
Check
external
device and
cable
Check external
device and
error
cable
※ All Settings  General  HDMI ULTRA HD Deep Color  On/Off
4
Established
date
Revised date
Color
Replace Main B/D
error?
N
End
External device
Y
Replace Main/T-con B/D
/Cable
normal
N
Request repair
for external
device/cable
N
External device
/Cable
normal
Y
Check the
Menu
HDMI ULTRA HD
On?
Deep Color menu
Y
4/15
Y Replace module
Or T-Con B/D
N
Replace Main/T-con B/D
Menu Off and Re-Check
LGE Internal Use Only