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Normally the T-Con board will cause this loss of video image. You can order parts from any of the many TV parts suppliers online, just Google "Samsung TV repair parts" Remember this is just a guess since the diagnostics have not been run.
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.
I have a UA40EH5000M samsung led tv. Suddenly the screen went blank. only sound is there, no display. Which part may have the problem..please suggest..
Simple answer. No. But please read on . . . Full HD Freeview, i.e 1080p does not exist. The four HD channels currently available on Freeview all transmit at 720p resolution. There is insufficient bandwidth in the TV transmission range for the HD channels to transmit at 1080p. It could be done, but it would be at the expense of other channels.
Your TV, however, is Full HD, as indicated by the 1080p in the specifications. This means it can display a full HD picture from a device which outputs at 1080p resolution. Devices which generally output at 1080p resolution include Blu-ray DVD players, games systems and PCs.
When viewing a Freeview HD channel, your TV will display the picture in 1080i (interlace) resolution. This is not true/full HD. The transmitted picture comprises of 720 horizontal lines and the software inside the TV is creating the additional 360 lines and interlacing them between the 720 lines from the original transmission in order to create a 1080 line picture which fills the entire screen.This process is commonly known as 'upscaling' and can cause deterioration in the overall picture quality, most noticably on poor quality, cheap TVs.
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