Vertical/Horizontal Bar, Residual Image, Light Spot; External Device Screen Error-Color Error - LG 42LV3400 Service Manual

Standard Repair Process
Error
LCD TV
symptom

Vertical/Horizontal bar, residual image, light spot

Check color condition by input
-External Input
-Component
-RGB
-HDMI/DVI
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
Screen device
normal? connection
condition
N
Replace
module
Check screen
condition by
input
N
-External Input
-Component
-RGB
-HDMI/DVI
Y
N
Y
Check and
Y
Normal? replace Link
Cable
N
Request repair
for external
device
External
Connect other external
Input
device and cable
error
(Check normal operation of
External Input, Component,
Component
RGB and HDMI/DVI by
error
connecting Jig, pattern
Generator ,Set-top Box etc.
RGB
Connect other external
error
device and cable
(Check normal operation of
External Input, Component,
HDMI/
RGB and HDMI/DVI by
DVI
connecting Jig, pattern
Generator ,Set-top Box etc.
5
Established
date
Revised date
N
Screen
Replace Main B/D
normal?
Y
End
Screen
normal?
Request repair for
external device
Screen
normal?
5/13
Replace
Module
N
Screen
normal?
Y
End
N
Replace
Main B/D
Y
Y
N
Replace
Main B/D
LGE Internal Use Only