LG Electronics 640T-ZA Vertical/Horizontal bar, residual image, light spot, A10/ A11, date

Standard Repair Process

	Error	A. Video error	Established	2010. 12 .14
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

☞A8

Check color condition by input -External Input -Component

-RGB

-HDMI/DVI

☞A12

Check Test pattern

Screen Y normal?

N

Replace module

Check external device connection condition

Y

Normal?

N

Request repair for external device

☞A10/ A11

Check and replace Link Cable

Screen N normal?

Y

End

☞A28

Replace Main B/D (adjust VCOM)

For LGD panel

Replace Main B/D

For other panel

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

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-top Box etc.

	N
Screen		Replace
normal?		Main B/D

Y

Request repair for external device

Y
Screen N	Replace
normal?	Main B/D

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