LG 50LF6090 Service Manual page 45

Standard Repair Process
Error
symptom
☞A8
Check color by input
-External Input
-COMPONENT
-AV
-HDMI/DVI
☞A12
Check Test pattern
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A. Video error
Color error
☞ A10/ A11
※ Check and
replace Link
Y
Color Cable
error? (LVDS) and
contact
N
condition
Check error color
input mode
External Input/
Component/ AV
error
HDMI/DVI
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
Check external External device
device and /Cable
cable normal
6 / 97
date
Y
Color
Replace module
error?
N
End
Y
Replace Main B/D
N
N
Y
Replace Main B/D
4/13
LGE Internal Use Only