Alvan and The Chipmunks reside in my Gmax 2100 speakers!

computer stores/shops --online search

Try Control Panel > Sound and Audio Devices > Volume > Speaker Settings > Advance. Choose Speaker setup.

control panel sounds and audio,audio make necessary adjustments there or control panel,administrive tools,computer management,device manager,sound,could be a yellow question mark? right click to re-install drivers
good luck

http://www.fixya.com/support/r4871388-installing_missing_drivers_free_charge

Please rate my answer if it helped you

Under Windows XP, click Start
Click with the SECOND (usually the RIGHT) mouse-button on "My Computer".
Click Properties.
The first screen will run a short "speed-test" to determine your "actual" CPU-speed, and to display the "rated" CPU-speed, e.g., 3000 MHz running at 2.99 Ghz.

http://cgi.ebay.com/Gateway-GMAX-2100-2-Speakers-%26-1-Subwoofer-SOUNDS-GREAT_W0QQitemZ180337310490QQcmdZViewItem

at any computer store

This is a duplicate post, click the following like to view the active posting: http://www.fixya.com/support/t129710-speakers_work_just_not_when_plugged

Ok There is another chance to work your speakers ,

  If you have your mother board CD , get play that  and  reinstall the sound system .

  I hope it will work ,      please do reply

It is possible that either the speakers or the sound card have an internal fault. The best way to isolate this type of problem is to use a different audio source than your sound card uses in order to test the speakers. You can use a portable CD player, the headphone jack on your CD or DVD drive, or the headphone jack on your VCR, for example. In some instances, the speakers have been known to pick up noise from an external source. This is difficult to isolate as just about every electrical device in your house/office gives off some amount of radio frequency (RF) or electromagnetic interference (EMI) signals. Some of the more common items that can cause noise are: Your monitor Fluorescent lights An uninterruptable power supply (UPS) The computer itself Fans Turn off as many of these devices as possible before you test your speakers. Also, if your speakers are plugged into a power strip or UPS, try plugging them directly into the wall outlet instead. Good luck