Samsung 40" LED TV Display

There are many reasons for this fault. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Search the site by type in the "brand name" to your device; (Exclude the model number), or "Double image" in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

If it's picture that's giving a double image from your terrestrial aerial it's called ghosting , you need to move your antenna it's caused by signal reflection and usually happens when your in a strong signal area.

IF it is still under warranty, take it in to be replaced.

It sounds like it was dropped or banged hard. I would suggest just replacing it.

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..

does it go away when the set warms up? or if you tap the set? Sounds like a possible defective LCD panel tab. Samsungs and Sony's are known for this.

Try replacing the tcon board

Hello
Double images are technically called Ghosts, occures due to the setting and direction on the antena. You have to reorient your antena, in such a way that Ghosts disappeares from your screen. The reson for this fault is not with the TV, as it gets a direct transmission signal, and a reflected signal of the same, reflected from near or far objects, like tall buldings, hills and so on. The signals, the orginal and the reflected, will be processed by the TVs internal ciiruit, and the first will appear as strong picture, followed by the second, a weak picture, will be seemed as an image of the first one, just on the right side [view point] of your TV.
You just adjust the position and height of your antena, looking the picture, where there is minimum Ghost level is. No other repair should be done to your TV, as it is perfect, and you just give it only direct signal path. OK.

Tv have a convergence problems,it dead.Tv convergence board is dead.Require changing the 2 STK convergence ICS and some or all it resistors.To solved the tv convergence problems.Tries Websites like Tvrepairworld.com,Tvrepairkits.com to buy a convergencce kit.To replaced those convergence parts on the board.