I have looked through these forums/asus/analog/realtek/&couple.others as well and have still as of yet to find a working fix for no sound issue on the p5q deluxe motherboard. Has gotten me close but no cigar.
My current setup is WinXP Pro 32bit SP3, I used the hotfix found in this article
and that helped as it does take care of a known issue. However I cannot find one version of SoundMax that will install on my machine, they all say does not function with his version of OS......
I am able to use my usb mic to input sound it is recognized and confirmed by a friend on ventrillo.
However I am getting no sound via my headphones which are plugged into the rear plugs of the mobo, there is 6 total for 5.1 sound, and as said in the manual, the green center plug is also intended for Heaphone output.
I have yet to get anything come out of these headphones, and yes I checked on a known good system the headphones work fine.
I have found various mentions of a win7 driver working for winxp, I tried would not install. (AD200B_6570_Win7)
I do get sound. Did u try the P5Q drivers that came with the CD? Maybe u did and youre still having issues? Did u try downloading the SoundMAX Audio Driver v220.127.116.1180 for Windows XP. SoundMAX Audio Drive v18.104.22.16880 from the Asus support site?