Satellite L675 - line out echos sound

I am a senior citizen. I have my laptop connected to my big screen tv - for ease in seeing (eye problems). Also, I stream a lot of movies through netflix. The computer is about a month old. The first 2 weeks everything worked great. Then, the sound started coming out of the computer speakers as well as the tv - which gives an echo (they are slightly off sequence). Makes it nearly impossible to watch movies. I have uninstalled my sound card and rebooted; I have unplugged the line out and rebooted. The audio "line out" is checked. But, when I do a sound check - I am STILL getting sound from the computer.
Any suggestions????
George, in Nashville

I have a follow up to the issue that George is having. I have the same model laptop and had the same issue. Now, I do see that you have the option to select either "Headphone" or "Line out" when connecting the audio jack to the TV. When using headphones, I can limit the output to the TV, and the "Line out" will have output coming from both the laptop speakers and the TV. However, and I may be mistaken, but isn't the audio quality better on the line out setting? Isn't additional information filtered when you go to headphones? It may be an incorrect perception on my part, but I feel like i'm getting higher quality audio out of line out. Because of this, I would rather have the laptop set to "line out" while still shutting off the laptop speakers.
Any thoughts? Anyway to achieve this?
Adam

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Hey everyone, I just sent an email to MSI Tech Support, but figure I would post a message here as well. I just put together a new system, but I'm having a problem with the back line out port.
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icab

Quote
Originally posted by Steve F.
You could try:
1. Read the manual
2. Search this forum.
Rear sound problem
Third time this has come up in 1 or 2 weeks.
Steve,
I appreciate the reply, but I believe you are wrong. Yes, I have searched the forum and did find that thread. Yes, I have read the manual. The only thing that it says is: "If you don't want to connect to the front audio header, pins 5 & 6, 9 & 10 have to be jumpered in order to have signal output directed to the rear audio ports. Otherwise, The Line-out connector on the back panel will not function." That's not my case since I want both ports to work (not outputting the signal both at the same time, obviously).
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I have an IBM machine with an intel mobo at work and it works as mentioned in the design guide.
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3Enabling same Line out on my sound card (XFI Music) Hello all,
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end tell
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tell application "System Events"
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Satellite L675 - line out echos sound

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