Sound is not working.

Hello,
I have Satellite U305-S7448, (worked fine before) but my sound is not even showed in the PC properties.
Any idea why?
Thanks in advance

 

Your missing a driver. Try using google to find it. I would find it for you but im at work . Im viewing DP 4 by 4 lol.

 

All drives tried, none of them work. suddenly

 

Buddy its all due to missing driver. No driver no device is visible anywhere in PC.

 

Try calling up the support, that could be the best option instead of wasting a lot of time on it.

 

I will try to install original Vista, (some DVD which will recover it) if no audio there, I guess it is broken.
Btw, I have tried all drivers possible...

EDIT:
No Audio Output Device is installed, in vista,

 

In vista, getting error "No Audio Output Device is installed"
When trying to install the updates from DVD it says: "The update does not apply to your system"

How is that possible?

 

# Did you plug in the powercord of your speakers?
# Are your speakers turned on?
# Did you hook up your speakers to your computer?
# Did you hook up your speakers to the correct output?

 

It's laptop so
1. integrated
2. not even detected in hardware list
3. no need
4. -||-