I have an older Toshiba Satellite A105-S4134 model laptop running Windows XP, SP3. It has a Realtek HD Audio device. I get absolutely no sound from it with the volume cranked full. Device Manager indicates the Audio is enabled and no conflicts. I've tried reinstalling the driver, updating the driver, all with no effect. Don't believe its' a hardware problem. Any ideas what the problem is?? Thanks !!