Ok, My problem is i have no sound. I have a Presario 4420. The Sound card is a SoundMAX Intergrated Digital Digital Audio. I just had the power supply replaced because it just stoped worken. when i got the computer back the sound didn't work. There was a sound driver error so i uninstalled the driver then reiinstalled the driver, but it would not install completely because it just says that there might be problem in the hardware. so i am not sure what to do. if it is broken then... well at least i can move on from there but if there is somthing else i can do about it that would be great any tips would be nice.