Why does my 42 inch LGD450 have no sound after plugging headphones in

HI,
Its normal. I all the device when you plug in the headphone the internal speaker will turns off . Use your logic we use headphone for privacy.

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It's probably a broken wire.

First, make sure it happens with those headphones no matter what you plug them into. If you're using them on your computer, try plugging them into your phone or someone else's computer. If you're using the quarter-inch adapter, try plugging into something that will take the eight-inch plug (the picture I'm seeing of your headphones shows an eighth-inch plug with a quarter-inch adapter). If the problems goes away, then it's either the adapter or the audio jack on the original device. But a new quarter-inch adapter online or at your local Radio Shack. If that doesn't fix it, then the jack on your device is shot, and your best bet is probably to get a new device. (Before I spent the money on a new device, I'd borrow another set of headphones, just to be sure that the problem persists no matter what headphones you use.) If the device is a computer, then you can buy a USB sound card (which plugs into a USB port and has mike and headphone jacks on the other end) instead of replacing the whole computer.

But it's more likely that the problem will persist no matter what you plug into, and it's your headphones. It's probably a broken wire; sometimes if you jiggle the wires going into the dead earpiece, you'll get crackling to confirm this diagnosis. But it doesn't really matter why the headphones don't work; no matter what's broken, the repair is more expensive than replacement. Time for new headphones.

The above answer assumes that you are listening to a stereo sound source. In addition to trying your headphones on another device, you should make sure you're listening to a stereo sound.

Just get a headphone jack that does not shut off the speakers and have your dad plug his headphones into that.

Hi - I'm Tina from Suddenlink. Please check our help site with information and codes for programming Suddenlink remotes: http://help.suddenlink.com/Television/Pages/RemoteControls.aspx

Hi there,

Connecting a laptop to a tv is usually achieved by the use of an audio cable with a 3.5mm stereo plug on one end, and male Red / White RCA connectors on the other end.

Plug the 3.5mm stereo plug into your laptop "headphone" socket, and connect the Red / White RCA connectors to your PC-in audio RCA sockets.

If you tv's PC-In only supports the 3.5mm audio socket, then purchase a lead with 3.5mm stereo plugs on both ends.


Cheers

Please plug/ connect this wireless headphone base unit in Line Out jacks at back of amplifier to get sound in headphone and turn down amplifier volume control to shut off its speaker sound.
Thanks.

I suggest you return it after you have checked that you didn't turn it off in the menu or plug anything into the headphone socket.

I hope I have been of help but please do not hesitate to ask if you have any further questions.
I appreciate your vote if you appreciate my reply.

Use the MUTE button on the remote to mute your TV speakers and then you can still use our headphones. You can continue to adjust volume with the remote and it will only affect your headphones. You may need to do this each time you turn on the TV and use headphones, but that is a small annoyance.

You need a 1/8 in cord on both ends. Normally, its an 1/8 inch audio connection in your tv to work with PC (the same connection as when you plug it in your comp) So u would need a wire that both ends are 1/8 inch (Headphone jack sized)