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LG Manuals
LED TV
28LM4 0B-PU Series
Service manual
LG 28LM4 0B-PU Series Service Manual page 27
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Standard Repair Process
Error
symptom
A6
Check color by input
-External Input
-AV
-HDMI
A8
Check Test pattern
A. Video error
Color error
A7
A7
Check and
replace Link
Y
Color
Cable
(EPI or LVDS
error?
Cable) and
)
N
N
contact
condition
Check error
color input
mode
External Input/
Component
error
HDMI
error
- 27 -
Established
date
Revised date
Y
Color
Replace Main B/D
error?
N
Check
External device
external
/Cable
device and
normal
cable
N
N
Request repair
for external
device/cable
N
N
Check external
External device
device and
/Cable
cable
normal
4/13
Color
Y
Replace module
error?
N
N
End
Y
Replace Main/T-con B/D
Y
Replace Main/T-con B/D
2019
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