I have a Sony Vaio VGN-SZ110 and my cooling fan broke. I bought a new one and installed it (which made me virtually take apart the entire computer). Regardless, I got the cooling fan to work and everything was good, but I found out that my sound didn't work. Looking at my system, I figured out that with my on-board sound system, I needed to enable on-board sound through CMOS. Unfortunately, I think my CMOS cleared or something because the CMOS is very basic and does not allow me to disable/enable on-board sound. Also, when I put the computer back together, I had to put the time back to normal, so I am almost positive the problem is related to the bios. From here, I thought that I needed to update my BIOS firmware. Unfortunately, I cannot find the firmware for my motherboard board with Vista Home Premium. I have a Phoenix motherboard but I cannot find a collection of drivers for that manufacturer Please help! Thanks Ryan

If there is indeed a disable/enable setting for the sound - it has to be located somewhere within that BIOS. You just got to look for it. However, I do not see how or why Sony would have it disabled by default on the laptop.

I just looked at the CMOS info and it is Phoenix TrustedCore(tm) Setup Utility. All they have is system time/date, LCD system expansion, network boot and external boot options, and then the boot order. I am convinced (knock on wood) that there is no option for disable/enable with the on-board sound. What else could be wrong?

Is it listed in the device manager? If it is then it's not disabled & it may be that something else might have been disconnected while you were in there. But check the device manager enumeration first.

It is listed in the device manager and there are no conflicts or anything. I think the problem lies with the IFX-442 board, but there is so little information online about it. This is the PDF I used to take apart my computer and the IFX-442 board is shown in the PDF. Maybe I set it up wrong, but the setup seems very basic. Just connect the coaxial cable,screw it in, and put it on the side of the computer. http://pds5.egloos.com/pds/200703/2...