LG 43UF640 Series Service Manual page 33

Standard Repair Process
Error
symptom
A6
Check color by input
-External Input
-COMPONENT
-AV
-HDMI
A8
Check Test pattern
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A. Video error
Color error
A7
Check
and replace
Y
Color Link Cable
error? (V by one)
and contact
N
condition
Check error color
input mode
External Input/
Component
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
Check external External
device and cable device/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
4/16
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