i have a dell xps 400 and run xp and this started a while back but i havent been able to fix it, only half of my speakers are working and i would like to get them all back up and running. i think it has to do with the idt high definition audio codec, but im not sure? it says this devise cannot start code 10? can someone help? i really have no idea where to start, let me know if you need any more info? thanks