No sound from headphone or speakers

I have got problem with sound in Vista Home Premium. My laptop works perfect till yesterday since I have bought it. Yesterday, I put it into sleep mode and after it resumed, sound is gone either from notebook speakers or the headphone. I checked installed windows update and uninstall them. Moreover, I also make system restore to the day before yesterday. I have already uninstall and reinstall the sound driver (Realtek HD Audio) but the sound is not coming yet. No yellow ? in device manager and everything seems to work. It looks like speakers are working since I can hear some noise whenever it is supposed to make sound. My sound driver is up to date.

My notebook specification are as follows:
Toshiba Satellite A205-S5859
Windows Vista Home Premium with SP1 (pre-installed in the notebook)
Realtek HD Audio driver for Sound
Toshiba Software Modem

Hope what I have posted have enough information. Please give me some good advise to bring my sound back.


Tun