Speakers emachaine brand sp30A. Can they be used by just plugging

Yes, you can either plug speakers into the back of the monitor in the orange colored slot. But in order for this to work, you must also plug the computer tower audio output into the Sansui's audio input port, which is located directly underneath the monitor's video input (where it is already connected to the computer). If that sounds like too much work, you could always just plug your computer speakers directly into the audio out of your computer tower.

LOL. This is a common, easily solveable problem. Remove your cellphone or anything that emits radiation of any sort from the general area. Don't believe me? send a text message while sitting net to your computer. It does this even if you arent sending a message because your phone sends intermittent signals to the cell tower.

Look for a green 3.5mm port (the size of a headphone jack) on the back of your tower and connect that with an audio cable to the computer's speaker output (probably a green plug also on most PC's)
If the monitor speakers have their own power supply make sure they are also plugged in and powered on.

Please Install Sound driver properly

1st make sure the USB port works (try plugging it into a differant USB port, if that still gets no results try installing the driver again that may make all the difference in the world atleast it won't hurt to try

its most likely a driver issue make sure that when they get plugged in there is some sort of conformation either on the computer or on the speakers with a light now thats you have ensured they are getting power check both ends of the speaker wire ensure neither the wire or the inputs for the wire are damaged there should be little or no play for the wire to move after being inserted . after ensuring that it not a hardware issue(to really be thorough you could hook them up to another computer and make sure after the moving process they still work) I would suggest going to the HP website and walking through they're troubleshooting mnual if still to no avail and they are under warranty just return them for new ones

The center one, right? You need to plug in all 3 plugs in the sound card, otherwise they won't work.

this is exactly the problem I am having but with a new ipod nano. Please post if you hear back. thanks!

Very easy just plug the jack at the back of the computer. In the sound card it is color coded. So plug it in the green one.

Jason

I think is better to get your equipment, to repair shop and see to fix the input for the sound, it is better, or buy a new board, it is cheap, you may found, on 140.00 less ASUS or SOYO brands,
good luck