We have a Samsung UN32EH4003FXZA (QD06) flat screen TV. I was disappointed to find that I cannot feed the sound from the TV into my stereo system.

Most likely the back light US you will need to get it look at if it's economically viable that is, try YouTube as thats what I would do to find out if I could do it myself. Regards David

The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

The UN32EH4003F needs a streaming device to connect to Wi-FI. This can be a set top box (Amazon Fire, Roku) or one of the streaming sticks. You can't use a USB wireless adapter to connect the TV to a network. The specifications and manual for the TV are available from Samsung support: http://www.samsung.com/us/support/owners/product/UN32EH4003FXZA . The current link to the manual is http://downloadcenter.samsung.com/content/UM/201406/20140627170213074/[UE4003-ZC]BN68-04466A-02ENG-1016.pdf .

I hope this helps.

Cindy Wells

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. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

It is the backlight that is burnt out not the circuit boards, pull it apart and check also where the backlight connects if that connector is burnt replace it also.

You will need a cable with red and white RCA plugs at both ends. Audio out from the TV Red And White jacks on the rear or side of TV to red and white AUX jacks on your stereo Most older flat panel TV's have the red and white audio out RCA jacks **NOTE Newer flat screens like Samsung Smart TV only have digital sound output, or HDMI and if your stereo doesn't have an optical sound input. You can buy a digital to analog adapter at Best Buy or Wallmart. Hope this helps!

When you say you turn it up, I assume you see a volume bar appear on screen which changes as you change the volume. Try going into the TV menu with the remote and navigate until you find settings for the audio/sound making sure the speakers are set to "On". If they are you are more likely to have a problem internally requiring service.

You can, as an alternative, connect audio cables from the output of the TV to a stereo receiver/amplifier and see if you get sound that way, although that is only a work-around for your real issue.

You could also feed the TV digital audio output to the stereo amp via HDMI, digital coax, or fiber optic, if the stereo has those inputs.

This TV doesn't have wireless capability
Here is a quote from a review:
It also has the HDMI interface which I use to plug in my Chromecast Dongle. This device permits me to send movies, youtube, Netflix, from my personal computer over to the TV wirelessly.
32 LED 720p HDTV Wide Color Enhancer Samsung UN32EH4003F

You will probably need a hdmi cord

First verify that the mute is disengaged (toggle the mute button). Second, check the sound configuration to make sure the internal speakers are on, or check the sound output to make sure it is going to the inputs of an external audio amplifier (stereo receiver) and that the external amplifier is working. Try a different input source - perhaps the problem is your cable feed or DVD player.
If the internal speakers are on, the volume is up, and you still don't get any sound from a known-good source (TV channel, DVD player, etc.), then try running the sound to a stereo system as described above.
If that works, you may have a shorted speaker amplifier (depending on the set's design, this may blow a fuse supplying power to both left and right amplifiers or a speaker protection circuit will keep the speakers disconnected). These aren't usually hard to repair, but if you find a blown fuse, fix the amplifier before replacing the fuse or you'll just waste another fuse.