Go get a KNOPPIX CD and boot it. See if it can make the system produce sound. If not, I fear this may be like another failure I've seen (the motherboard failed) or another bum OS install.
I had a previous post advising I lost my sound on my Compaq 12XL400 Laptop - currently I restored system to out of the box from factory with recovery CD again and am running the original Millenium - here's what I have found - unit is now virgin - under SOunds & Multimedia properties/Devices Tab/ Audi devices - I see items(2) Audio for Via AC'97 Audio Controller (WDM)- they look like duplicates but 1 stated "Driver enabled but inactive due to an unknown problem" - the other states - under properties "driver is enabled and active" - But I am getting no sound - I went to system devices and remove AC'97 Audi Controller
I went to Compaq Site and down loaded the latest driver and burned to a CD - I tried to install new hardware and driver and during set up I got the following "VIA AC97 Audi Chipset is not enabled - Enable it in BIOS and then run set up"
I restarted and F10 - I got into Bios but there were a limited amount of selections - nothing regarding VIAAC97 Chipset - Can anyone tell me how to enable this chipset ?????????????