CD Speakers wont work on pc anymore

Ok i have a philips fwm589 and i have been using the speakers on my pc for about 3 years now and for some reason they have stopped working. I connect to my pc with a white and red wire from the speakers in an aux point on my pc soundcard. If i turn on my pc with the speakers connected it says in control panel that the speakers are working and i can see if i play music the green bar goes up and down so its trying to output sound, but my speakers make a blurry noise and you can JUST hear the sound when the volume is max. I tried playing a cd on the speakers and the speakers worked fine. I also tried connecting my speakers to my television and the same thing happens when i connect it to my pc, the speakers just go blurry, is there anything i can do to get sound working from my pc on my speakers? Or any other way i can connect my speakers to my pc? Btw im using windows vista if that helps, thanks.

Have you changed anything on your computer? That is, did they just suddenly stop working, or did they stop after you upgraded or got a new computer?

At any rate, most (if not all) computer sound systems these days require "powered" speakers to work. That is, the output of the computer (and probably the TV btw) is at a very low (line) level that can only power headphones directly. To use speakers, the speakers need to have amplifiers built into them. So, this leads to a few possibilities I can think of offhand.

1. They are not powered speakers.
2. They are powered, but you forgot to plug in the AC adapter, or the AC adapter is dead, or, if they use batteries, the batteries are dead.
3. They are powered, but the built in amplifiers are dead.
4. Blown sound card.

If you have upgraded the computer and the sound card or built in sound has changed, #1 is most likely. If they suddenly just stopped working, #2 or #3 is more likely.

Ive been using the speakers for years and they have been fine, they just suddenly stopped working if i connected them through an aux point. But i can still play cds through them and they work fine.

Looking at the speakers on the Philips website, I don't see how they ever worked. They are just ordinary non-powered speakers with plain wires attached. I don't even know how you managed to attach them to the sound card unless you used a mini-plug adapter.
let me add option #4 - You blew the sound card in the computer.

it does sound like a sound card problem or sound card driver problem

did u jus install vista recently?
it could be teh drivers

and depending if u added any other recent hardware...
it could also be the power supply not havin nuff power

Right i just plugged my speakers into my laptop and they worked fine so i think it must be the soundcard.

The soundcard may have been overdrawn or the drivers may be corrupted. Reinstall the drivers first. That is the most likely cause, considering laptops are far less prone to hardware voltage irregularities because of their power control schemes.