To see if this is so we go to the Control Panel, if you follow these tips with Windows XP: XP Audio Driver.
If you have Windows Vista or Windows 7/8, the control panel, click Hardware and Sound, after the first line in the Devices and Printers click on Device Manager (the old Device Manager) and choose the Sound, Video and games, will appear on your sound device, if there is a yellow exclamation mark, this means that the device is unknown. In almost all cases it is just a driver issue, not a hardware problem of the card, so quiet that can be remedied by installing the right driver, just download it from the manufacturer by inserting the card model, even if it is integrated into motherboard, in this case you can find the model on the mainboard manual.
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