It's likely not a hardware issue, but rather software. After a format and clean install of the OS, you need to install the motherboard drivers for your particular motherboard.
If the soundcard is a pci card, you install the driver for that card. If the soundcard is integrated in the motherboard, go to the motherboard manufacturers website to download the drivers for that motherboard.
Windows will sometimes have the correct driver already installed, but many times they do not. It's left to you to find and install the right one.
i reccently installed a clean xp pro installation on my pc, but after a month or so of using it it started to not have audio on GTA:VC and the game said there was no hardware so it couldn't play the audio, i said myself "it may be a game issue, check it later"
after a week of that suddenly i woke up and turn on the machine one saturday it did not make any sound (only system sounds that I hate)
i checked the device manager and it says there's no hardware for the sound
but my pc is intact as when I reinstalled XP
can anyone help me?
oh and other dell optiplex pc i have here havs the same issue (my nephew said that), and one of my friends has the same problem
it makes me feel angry cuz i am a music lover and i can't hear anything!!!!
by the way