I have a Samsung 40" LED Smart TV (UN40EH5300FXZA). Screen whnt out and I did flash light check on it and I see figures working on the display. I see no back lights shining in back of TV.

If the TV displays the menu or Smart Hub when you press the button on the remote - the TV is on, it's just displaying a black screen. Change the Source on the TV to another input. See the page on Samsung TV has No Picture for more troubleshooting steps.

Depending on the TV, there will be a Jog Controller or TV Control Stick that will allow you to access the TV menu and change the source. Use the control on the TV to select an option - toggle it left or right to see if anything appears on the TV.
If the control menu appears on the screen, the TV is on but not displaying any input. Check the connections or change the input source on the TV. If the controller button works on the TV, but not the remote, check the batteries in the remote control.

Unplug the TV from the power source and leave it for a minute or two. Reconnect the power cable directly to the wall rather than a surge protector. If the TV Standby light appears - the TV is receiving power. If the Standby light still doesn't appear, please get in touch to organise a service.

If you wish to get some details; visit the site linked here. Pull up older posts. http://electro-medical.blogspot.com/

Hi!

Check the backlight circuit, but first, check the power supply of the blacklight circuit, does it feed the backlight circuit or not. If not, it's the power supply circuit, if yes, check the backlight circuit itself, and if it works, check the backlight themselves, the led. Good luck,


Serge.

http://www.cnet.com/forums/discussions/samsung-smart-tv-turning-off-609897/

http://www.samsung.com/us/support/owners/product/UN40EH5300FXZA
Try this site.
http://electronicshelponline.blogspot.com/

Here is what to check when your TV is turned on, power light is ON, but no picture is seen or sound is heard:

1 - Be sure the component you are using (Xbox, Cable, SAT, ROKU) is turned ON.
2 - Check to be sure all cable and cords are securely connected to the TV inputs and component outputs.
3 - Make sure you are on the correct input as some TV's will show a black screen if there is nothing connected to that input.
4 - Unplug the input you are trying to use from the TV (such as an HDMI Cable) and plug it back in.
5 - Check for signs of damage on all cords and cables from the TV to all components.
6 - Make sure the TV is not in ENERGY SAVE MODE, press the button on the remote control to go back to normal mode.
7 - Unplug the TV for 10 minutes to see if there was a temporary one time issue with the TV.
8 - Disconnect the TV from power for 2 minutes, then when plugging it back in PRESS AND HOLD THE POWER BUTTON ON THE TV FOR 10 to 20 SECONDS to try and force the TV to reset.
9 - If after checking all these different issues, you may have a Faulty Power Supply Board, A Bad Capacitor on the Power Supply Board, Loose Wire Harness, or Loose Ribbon Connector in the TV itself.
10 - Most likely when a TV has the power light ON but NO PICTURE and NO SOUND, it is the Power Supply Board that has failed.

BTW, here are solutions for you to play iTunes movies on Samsung smart TV

Start here:
http://www.manualslib.com/manual/267856/Samsung-Un40eh6000f.html?page=13

Then try here:

http://www.badcaps.net/forum/showthread.php?t=38349

it's the inverter. you can get one here. tvtechparts com

I would suggest on a new TV.

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Amazon com smart tv led 40 Electronics