a month ago my laptop broke and had to be shipped back to HP, upon receving it back they had to replace the entire motherboard. Before my laptop broke my audio was fine, upon receving it back its working different and im unsure if im just maybe making the problem up in my head or is it really a hardware problem. For instance, before my laptop broke when my windows started up there would be sounds, and when i would open aol there would be sound 'welcome' 'you got mail' 'goodbye' but now there isn't. When I put my itunes on i can play a song and hear it fine, however, on other programs like on windows messanger live, when I play a game sometimes the sound doesn't work. Do you think upon fixing the motherboard something was damaged or maybe a plug is hanging out? Also my laptop has a touchpad u can scroll the volume higher or lower, upon changing it it used to make a sound every bit to let u know the sound is being adjusted, now, however, there is no sound. I check my volume and everything is set to max. Anyone have any ideas?