Question about Altec Lansing VS4121 Speaker

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ALTEC LANSING VS4121 crackles when on. WHat possibly is the problem?

When the speaker is on, a crackling sound is intermittently produced.

Posted by Anonymous on

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Posted on Jan 02, 2017

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  • 205 Answers

SOURCE: Altec Lansing VS4121 no sound

If removing and reinstalling the driver fixed your problem then there was nothing wrong with the speakes. There was probably a problem with your soundcard drivers.

That being said, you should double check that you speakers are plugged in to the right sound board connector and the power supply is plugged into the wall outlet.

Does you computer have a headphone jack? If it does, you might try plugging a headset into it to see if you can hear sound there. If you do then you'll know the soundboard is working properly and maybe the speakers really are part of the problem. CD/DVD drives usually have a headset jack, but this will only work if a cable was run inside the computer from the CD/DVD drive to either the soundboard or motherboard.

What kind of computer do you have? Do you know if you have on board sound or a seperate sound board?

Posted on Nov 19, 2007

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  • 238 Answers

SOURCE: altec lansing vs4121

u dont need any driver to play the speakers, yes the sound card does, take down ur sound card modle no. and try looking in www.driversguide.com let me know.

Posted on Feb 14, 2008

SOURCE: No Power (LED off) in the Altec Lansing VS4121

There is a fuse on the power supply board which is held in place with 4 screws. Yiu will have to unplug the sub-woofer connector to remove it.

Posted on Apr 15, 2008

  • 11 Answers

SOURCE: Altec Lansing VS 4121

It is unlikely that this is a problem with your speakers more likely that it is a problem with the DVD player itself. I would recomend trying another DVD player.

Regards, Andrew

Posted on Sep 17, 2008

SOURCE: my speaker altec lansing vs4121 is just humming

Check the audio amplifiers Ic´s maybe are burned

Posted on Aug 10, 2009

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Hello Adrenalize, hi, you may be right, but also check other ICs as well, the humming sound can be caused by the amplifier or its preamp section, this is where the 1036 (this is a dc operated tone control) is located. But before replacing the 1036, try first replacing the POWER AMP IC. (my experiences with those humming sounds usually are caused by IC amplifiers and op-amp ICs.)

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It is possible to hook up these speakers to a laptop according to this brochure:

http://www.alteclansing.com/images/spec/vs4121%20sell%20sheet.pdf

Now this manual shows those speakers being hooked up to a computer but laptops have the same outputs as well so here it is:

http://www.alteclansing.co.uk/images/quick/vs4121qcc.pdf

you'll need adobe reader to read the manuals.

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My speaker altec lansing vs4121 is just humming


Check the audio amplifiers Ic´s maybe are burned

Aug 10, 2009 | Altec Lansing VS4121 Speaker

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It is unlikely that this is a problem with your speakers more likely that it is a problem with the DVD player itself. I would recomend trying another DVD player.

Regards, Andrew

Sep 17, 2008 | Altec Lansing VS4121 Speaker

1 Answer

Altec lansing vs4121


u dont need any driver to play the speakers, yes the sound card does, take down ur sound card modle no. and try looking in www.driversguide.com let me know.

Feb 12, 2008 | Altec Lansing VS4121 Speaker

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