Vertical / Horizontal Bar, Residual Image, Light Spot, External Device Color Error - LG 42LB65 Series Service Manual

Standard Repair Process
Error
LCD TV
symptom
Vertical/Horizontal bar, residual image, light spot
☞A8
Check color condition by input
-External Input
-Component
-HDMI/DVI
☞A12
Check Test pattern
External device screen error-Color error
Check S/W Version
Check
version
S/W Upgrade
Normal
screen?
End
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Only for training and service purposes
A. Video error
Vertical / Horizontal bar, residual image,
light spot, external device color error
Check external
Y
device
Screen
connection
normal?
condition
N
Replace
module
Check screen
condition by input
N
-External Input
-Component
-HDMI/DVI
Y
N
Y
☞ A10
Check and
Y
replace Link
Normal?
Cable
N
Request repair
for external
device
External
Input
error
(Check normal operation of
External Input, Component,
Component
and HDMI/DVI by connecting
error
Jig, pattern Generator ,Set-
RGB
error
(Check normal operation of
External Input, Component,
and HDMI/DVI by connecting
Jig, pattern Generator ,Set-top
HDMI/
DVI
6
Established
2014.01.20
date
Revised date
☞ A28
N
Screen
Replace Main B/D
normal?
(adjust VCOM)
For LGD panel
Y
Replace Main B/D
End
For other panel
Connect other
external device
and cable
Screen
normal?
top Box etc
.
Connect other external
device and cable
Screen
normal?
Box etc.
5/13
Replace
Module
N
Screen
normal?
Y
End
N
Replace
Main B/D
Y
Request repair for
external device
Y
N
Replace
Main B/D
LGE Internal Use Only