Question about LG 42PX4DV 42 in. EDTV-Ready Plasma Television

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LG 42PX4DV - HDMI Audio / PC Audio IN problem

I've just connected my new laptop to my LG 42PX4DV and can view the picture fine. However, I've just discovered that my laptop does not support HDMI audio (only video). I tried using a 3.5mm jack out of the laptop headphone jack to the TV Audio IN 3.5mm jack to get sound for movie viewing. However, HDMI overrides the 3.5mm TV Audio IN and I can't get any sound if the HDMI cable is plugged in. The sound works through the TV if the HDMI cable is unplugged. i.e. I can have sound without video OR video without sound. Are there any TV options (or upgrades) that get around this? I just want to be able to watch HDMI with sound. It doesn't have to be HDMI sound. Thanks.

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  • Anonymous Aug 08, 2008

    no sound from HDMI

  • servantboy Nov 29, 2008

    I have an LG LCD model 42L30 that displays video fine with a 3 meter HDMI cable but there is no audio. I tried multiple hdmi inputs with the same result. This is connected to a Dell Inspiron 1525 running Vista. I don't have another hdmi device or cable to test further.

  • Anonymous Mar 10, 2009

    i have the same problem, LG TV and Insiron1525 laptop great vidio but no audio the sound comes from the laptop only. free bumb

  • AnthonyxD Apr 04, 2009

    i also have this problem i have a LG 71SA1D-AA and it is trying to connect to the dell inspiration 1525

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I found the fix. Had the same problem.
I right clicked on the sound speaker icon in the bottom right of Windows 7.
Chose Playback Devices.
Once this window opens, then make sure you are on the Playback tab.
Scroll down until you see the HDMI Device. (Mine was hidden at the bottom of the list.)
Then choose "set as default".
The sound will begin playing on the TV with only the HDMI connected......no need for an extra audio cable.

Posted on Jul 14, 2013

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One quick fix you can try. plug in the HDMI cable, slect a digital audio sound output from the sound settings on your machine, then leave it connected and restart it. It just might work.

Posted on Aug 05, 2009

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  • Master
  • 489 Answers

If you using ATI Graphic Card

Please provide the driver link to the ATI HDMI applications. its a known problem from ATI

Posted on May 29, 2009

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Posted on Jan 02, 2017

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Hi andy838,

I see that you LG LCD HDTV is giving you a No Signal message on the Screen.

see steps Below on finding out what will show video on your LCD HDTV.

* First make sure that the HDMI cable is connected to your Laptop to the HDTV LG.
* On your TV check your remote control and look for the input or Source Button, this will help you set your TV for the HDMI connection.
* Once set, turn your Laptop on and see if the HDTV will provide Video from the Laptop to your HDTV using HDMI.
* I believe that works right, now we have video still we need to set the Audio to work from you Laptop using HDMI to your HDTV.
* On your Laptop lower right side look for your speaker icon, right click on the speaker icon then select Playback Devices.
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* Once audio to HDMI is set and you want to go back to your Laptop just set the speakers as the default device this will set your speakers have the Audio working again on the Laptop.

I hope that this will help you regarding your concern.

Have a nice day,


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