LG 55UB8500-UA Service Manual page 88

Standard Repair Process
LCD TV
symptom
☞A6
Check color by input
-External Input
-COMPONENT COMPONENT
-AV
-HDMI
☞A8
Check Test pattern Ch k T t tt
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Only for training and service purposes
A. Video error
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 C
error
HDMI
error
Color error Color error
Y
Color
Replace Main B/D Replace Main B/D
error?
N
Check
external external
t
device and
cable
Check external
device and
cable
4
Established
2013.01.31
date
Revised date Revised date
Y
Color
error?
N
End
External device
Y
/C bl /Cable Replace Main/T-con B/D R
normal
N
Request repair
for external
device/cable
N
Y
External device External device
Replace Main/T-con B/D
/Cable
normal
4/16 4/16
Replace module Replace module
l M i /T B/D
LGE Internal Use Only