LG 50UH5500 Service Manual page 87

Standard Repair Process
Error
symptom
☞A6
Check color by input
-External Input
-COMPONENT
-AV
-HDMI
☞A8
Check Test pattern
A. Video error
Color error
☞ A7
※ Check an
d replace Li
Y
Color nk Cable
error? (V by one) a
nd contact c
N
ondition
Check error col
or input mode
External Input/
Component
error
HDMI
error
Established
date
Revised date
Y
Color
Replace Main B/D
error?
N
Check exter
External device
nal device a
/Cable
nd
normal
cable
N
Request repair
for external de
vice/cable
N
Check external d External device
evice and /Cable
cable normal
4
4/16
Y
Color
Replace module
error?
N
End
Y
Replace Main/T-con B/D
Y
Replace Main/T-con B/D