LG Electronics 32LS679C-ZC Lcd Tv, A. Video error, Check Back Light, On with naked eye

Standard Repair Process

LCD TV

Error	A. Video error	Established	2012. 01 .14
		date
symptom	No video/ Normal audio	Revised date	1/14

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

Normal Y voltage

N

Repair Power Board or parts

Replace Inverter or module

End

※Precaution ☞A6 & 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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Only for training and service purposes