Question about LG Televison & Video

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Sir my LG LED TV model no 26LS3700-TB is not turning on when i switch on the power screen is black and red power signal is blinking 3 times and stops but the screen remains black. How can I repair?

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  • priyanka upadhyay
    priyanka upadhyay Dec 04, 2016

    Sir thank u so much for ur response...
    i also want to know how much it costs approximately to change main board?

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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. 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.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.

Posted on Dec 04, 2016

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I am working on one right now with a similiar problem. The power supply is bad in the one I am working on, and sadly, the part is not made anymore. I hope you have better luck than I am finding the bad component in yours. Sorry for the negitive answer.
Ed
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Problem is a bad audio IC esp if your are reciving 11 blink code
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The power supply board is dead.Tries the websites like Shopjimmy.com,Ebay.com to buy the refurbish power supply board for the replacement.

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