Hard to change the sound card in a laptop - it is probably integrated on the main board.
Try updating the sound drivers.
Go to the control panel, click on system, then on hardware, then on device manager, open the trees that address sound and see if there are any yellow or red warnings.
If there are, delete all of the devices that have the warning marks, click ok to get oout of the device manager and reboot allowing Windows to find and reinstall the devices you deleted.
If there were no warning marks, click on properties for all the devices connected with sounds and update the drivers where appropriate.
Edited by Enthusiast, 02 March 2006 - 11:14 PM.