LG 19LS350S Service Manual page 43

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