LG 50UL3G Service Manual page 18

Standard Repair Process
Error
symptom
☞A6
Check color by input
-External Input
-HDMI
☞A8
Check Test pattern
A. Video error
Color error
☞ A7
※ Check and
replace Link
Y
Color Cable
(EPI or Vx1
error?
Cable) and
N
contact
condition
Check error
color input
mode
External Input/
Component
error
HDMI
error
Established
Revised date
Y
Color
Replace Main B/D
error?
N
Check
External device
external
/Cable
device and
normal
cable
Request repair
for external
device/cable
N
Check external External device
device and /Cable
cable
normal
3
date
Color
Y
Replace module
error?
N
End
Y
Replace Main/T-con B/D
N
Y
Replace Main/T-con B/D
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