Question about LG 47 Inch LED TV 47LN5200 LN5200 Series HDTV

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LG LED LN5200 3 LED strips flash 3 do not. I do have sound and can see screen with flashlight and red power LED flashes 3 times.

I have my 47" LG LN5200 tore down, when powering up 3 LED strips flash with all LED's working and 3 strips do nothing. Is this possible the capacitor's for half of the LED's have failed? Note I do have sound, can see picture with flashlight and the red power light flashes 3 times. I am hopeful it is the capacitors instead of the LED's as that would be an easy cheap fix. I did do a voltage test on the capacitors with an analog tester and got a voltage spike when the working LED's Flash. One pair of capacitors spike the other pair had nothing. Thanks in advance for any help.

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Posted on Dec 26, 2016

Testimonial: "Thanks so much for your input. I have watched various videos about this issue but have never seen an instant on video where half the lights work and half do not. I think I will go board shopping and then if issues are not resolved replace LED strips. Everything seems to point to a portion of the board though."

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Posted on Jan 02, 2017

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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

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Can you tell if LED tv has bad LED strips before changing LED Board/Power Supply (as they're in one piece on a lot of TVs)?


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http://electronicshelponline.blogspot.com/
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