Transmit sound from laptop to HDTV

[dragan54]

Hello, I have a Compaq laptop running Win 7. It does not have an HDMI port. I want to reproduce what is on my screen to the LG HDTV, including sound.
I can connect the picture using the 15 pin connecting cable, but can get no sound. The fellow at Radio Shack sold me a cable that fits into the headphone jack on my laptop, then has a red and a white wire that connects to the back of my TV. I get no sound from that.
It was suggested that I get a cable that has an identical headphone jack on both ends and try that. Will this transmit the audio that is on my laptop?
Also, are there settings on my laptop that need to be changed in order to reproduce everything on my laptop onto the TV? I have a soundbar if that makes any difference.

 

[ram1009]

The cable you need should look like this:

http://images.yourdictionary.com/audio-jack

on both ends. Never listen to advice from Radio Shack.

 

[jaguarskx]

The advice that the Radio Shack person gave you should have worked since that was the same solution I've used years ago to get sound from my PC to the TV.

Assuming you hear sound if you stick in headphones, it might be that the cable is faulty or the TV's RCA plugs are faulty.

 

[dragan54]

The cable you need should look like this:

http://images.yourdictionary.com/audio-jack

on both ends. Never listen to advice from Radio Shack.

Headphones worked in the laptop jack, but the 3 prong cable did not. Will there be any settings that I need to change? Thanks so much for the quick reply!

 

[dragan54]

Best answer selected by dragan54.

 

[dragan54]

Do I have to change any settings on the laptop to get a full screen TV with sound?

 

[wanderer11]

If the tv resolution is different then right click on desktop>personalize>display settings and change the resolution. You may need to change the default audio device to the tv to hear sound through it.

 

[dragan54]

If the tv resolution is different then right click on desktop>personalize>display settings and change the resolution. You may need to change the default audio device to the tv to hear sound through it.

I got an excellent picture on my TV, but when I disconnected from the TV, my picture on my laptop had a large black border on either side. I went to some setting and changed it from 'medium' to 'small' and that fixed it.
I never had a chance to fiddle with the audio settings. Do you believe the single cable will allow me to get sound on the tv?

Thanks!

 

[wanderer11]

I don't see why it wouldn't work. Good luck!