LG Electronics 3450-ZC, 42LS340S, 42LS340T, 42LS3450-ZC Vertical/Horizontal bar, residual image, light spot, External device screen error-Color error

Screen
normal?
N
YCheck external
device
connection
condition
Y
N
Check and
replace Link
Cable
Normal?
Y
Screen
normal?
Replace
module
Check color condition by input
-External Input
-Component
-RGB
-HDMI/DVI
End
Vertical/Horizontal bar, residual image, light spot
Request repair
for external
device
A. Video error
Vertical / Horizontal bar, residual image,
light spot, external device color error
☞A10
External device screen error-Color error
External
Input
error Connect other external
device and cable
(Check normal operation of
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
N
Y
Replace
Main B/D
Screen
normal?
Check screen
condition by
input
-External Input
-Component
-RGB
-HDMI/DVI
Request repair for
external device
Component
error
RGB
error
HDMI/
DVI
Connect other external
device and cable
(Check normal operation of
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
Replace
Main B/D
Screen
normal?
N
Y
Check S/W Version
Y
N
Check
version
S/W Upgrade
Y
N
Normal
screen?
End
Y
N
Replace Main B/D
Replace
Module
Screen
normal?
End
Established
date
Revised date 6/14
LCD TV Error
symptom
Standard Repair Process
☞A7 ☞A8/ A9
Check Test pattern
2012. 01 .14
N
Copyright © 2012 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only