LG Electronics 32LM640S/640T-ZA Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable, date

Standard Repair Process

LCD TV

Error	A. Video error	Established	2010. 12 .14
		date
symptom	No video/ Normal audio	Revised date	1/13

First of all, Check whether all of cables between board is inserted properly or not.

(Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)

No video Normal audio

Normal Y audio

N

Move to No video/No audio

☞A1

Check Back Light	On	Y
On with naked eye
		N

☞A2 Check Power Board 24v output

☞A4

Check Power Board 12v,3.5v etc.

Normal Y voltage

N

Repair Power Board or parts

Replace T-con Board or module

And Adjust VCOM

☞A28

Normal Y voltage

N

Repair Power Board or parts

Replace Inverter or module

End

※Precaution ☞A7 & A3

Always check & record S/W Version and White Balance value before replacing the Main Board

Replace Main Board

Re-enter White Balance value

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