Your speakers worked with old computer but you got a new computer and there plugged in but wont work?

Answer 1

make sure they are hook to the right out put also check to see if your audio drivers are installed... that can be checked in your device manger right click my computer then choose device manger (under hardware in xp)

Answer 2

There are a few possible causes for this, the two most likely being 1.) They're not plugged in to the correct jack (computer speakers go into the green 3.5mm circular jack), 2.) Improper sound drivers on the new computer or some other form of software deficiency.

Assuming that it is in fact something wrong in the software, check that your volume is first not muted - both on the speakers and in your control panel. Should those both be turned on, up, and not muted, check to make sure that the sound card is actually enabled and that its drivers are correctly installed and up-to-date - sometimes they aren't. If this new computer came from a manufacturer such as Dell, you probably got a disc labeled Sound Drivers (SoundBlaster Audigy cards are relatively common sound cards these days). If not, then on a Windows computer, you can open the device manager (Start>Run>devmgmt.msc). Check under sound devices, see if the sound card is recognized (name would be along the lines of SoundBlaster, RealTek, or something like it), there are no warnings on it, and, when you double-click it or right click and click properties, it says "This device is working properly" - if it is not, then start researching how to get updated drivers for that particular sound card. Usually a quick search for the model's name and the word "Drivers" will give you the manufacturer's page and instructions for this.