I have a Compaq Presario s4020wm running XP. The sound died on it a couple of week ago. I go into control panel and check the device manager. It says the sound card and drivers are all working correctly and enabled. When I go into PC Doctor to test sound, it will play sound from the internal speaker and work fine, but it will not play any other sound in the sound test. I cannot get any sound when playing cd's or any online videos. Any help would be greatly appreciated.