Three of the speakers do not have sound - Logitech X-530 Computer Speakers

make sure speaker wires are all pluged in. if that dont wort check the speaker wire it my be broke in between speaker and player, try new wire

Speaker Placement Before shopping for speakers, try to imagine where you're going to put them in your room. Speakers can be placed on floor stands, hung on wall brackets, or placed on furniture. Subwoofers typically sound best in room corners or near the left- or right-front speakers.
The front three--left, center, and right--speakers usually sound best when positioned with their tweeters elevated to the same height as a seated listener's ears. In any case, try to keep the center speaker near the same height as the left and right speakers.
You can place speakers on shelves or on/in a low cabinet or entertainment center. Some speakers are better suited to this arrangement than others. "Acoustic suspension" sealed satellites are the most appropriate. Next best are ported speakers--as long as the ports are located on the front of the cabinet. However, speakers with rear-mounted ports won't perform at their peak when placed inside a piece of furniture.
As for the rear-channel surround speakers, they usually sound best when positioned three or more feet higher than the front speakers. However, high-fidelity DVD-Audio and Super Audio CD music will sound best when surround speakers are placed at the same height (ear level) as the front speakers.

Read more: http://reviews.cnet.com/speakers-speaker-systems/insignia-2-0-speaker/4505-6467_7-32912127.html#ixzz1MpaHsur1

What I want you to do is need a little work okay..
In your speaker set there are two satellite speaker which Right and Left. Also it has the sub woofer that contain the three terminals, the red,white and the power terminal. Connect the right speaker to the red terminal, left speaker to the white terminal and the power cord will be connect to the power terminal. In the back of your computer you can see the three sound terminals colors below. Insert the green speaker plug to the green terminal in the sound terminal on the back of your computer.

A lifestyle 20 system is stereo only. Two channels. Left and right.

its working in 2.1ch mode now...if you have a 5.1ch sound card then your settings on your pc must be wrong. go to playing devices and check the settings in configurations. if its in stereo then change to 5.1 surround.
if you're not using a sound card then check if your motherboard can handle 5.1ch audio otherwise you'll need a sound card.

the surround sound speakers plug into the rear of the computer with three plugs. an adapter comes with it to plug those three into one green plug. if you plug that green plug in, the rear and center speakers should work, although i don't know if the surround sound will work correctly but you should get sound

Most music does not put out sound from the rear speakers. Test it with a DVD, most of them use the rear speakers for some sound effects.

the surround sound speakers connect to the computer by way of three connectors. the system should have come with an adapter that plugs all three connectors into one green connector. if you color match that green connector into the computer you should get sound out of the central and rear speakers. not sure if the surround sound will work correctly for movies, but you should get sound

its probably the interference with the routers. try getting internet by bypassing the router. much easier sound quality.

Ob
viously something reset itself. Do a systerm restore back to a date when everything was working--that should fix you up simplest.