Vertical/Horizontal bar, residual image, light spot

Standard Repair Process

 

 

Error

A. Video error

Established

 

 

 

 

LCD TV

 

date

 

 

 

 

symptom

Vertical / Horizontal bar, residual image,

Revised date

 

5/13

 

 

 

 

light spot, external device color error

 

 

 

 

 

 

 

 

 

 

Vertical/Horizontal bar, residual image, light spot

Replace

Module

Check color condition by input -External Input -Component

-RGB

-HDMI/DVI

Check Test pattern

Screen Y normal?

N

Replace module

Check external device connection condition

Y

Check and
Normal?
replace Link

 

Cable

 

 

NCheck color condition by input -External Input -Component

Request repair for external device

Screen N normal?

Y

End

Replace Main B/D

N

Screen

normal?

Y

End

External device screen error-Color error

Check S/W Version

Check N version

Y

S/W Upgrade

Normal N screen?

Y

End

Check screen condition by input -External Input -Component -RGB -HDMI/DVI

External

Input

error

Component

error

RGB error

HDMI/

DVI

5

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.

Connect other external device and cable

(Check normal operation of External Input, Component, RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-topBox etc.

Screen

N

 

Replace

 

normal?

 

Main B/D

 

 

 

Y

Request repair for external device

-HDMI/DVI Y

Screen N

Replace

normal?

Main B/D

 

 

Copyright © 2012 LG Electronics. Inc. All rights reserved.

LGE Internal Use Only

Only for training and service purposes

 

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LG Electronics 42LT640H-ZA Connect other external device and cable, Vertical/Horizontal bar, residual image, light spot