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I have an LG tv model # 47LN5750.I have sound no picture. Tv flashes on shows lg logo then goes black , still have sound. Can someone steer me in the right direction as to what part I need.

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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 May 11, 2017

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Posted on Jan 02, 2017

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I have a LG 47LN5750. No picture, sound yes, I see menu when using the flashlight test and have no back lights showing. please help with my next steps in fixing this issue. Just happened this morning.


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