Sound not working, Says no audio output device installed

might need to go in a do a system restore to a point before the upgarade

The USB port is damaged, or missing the driver for that port, check device manager.

Hi tamjidzaee ,

Please follow the below steps to solve the problem that you have mentioned :-

1. Check if the sound driver has been installed in your system, you can check this by going in the control panel's sound and audio devices option , if you find all options disabled and it reads no playback devices and no recording devices, then you have no sound driver installed. Therefore in this case you would require to install your sound driver using your motherboard cd.
2. If you see your sound driver is installed in the audio options of the control panel and you also see the sound driver's name , then you need to check the volume in the volume settings to check if it has not been muted accidentally , if it has been muted , then please un mute it and things should work fine.
3. A good idea would be use a headset and plug it into your motherboard in the slot where the speakers output is received , mostly the green round slot.
4. If you have a front head phone option then you can try using it as well, if the headphone or headset works fine, then we are sure about two , things that the driver is installed successfully and there is a sound output from the audio output slots.
5. Now, when you have checked the sound via headsets then you need to make sure that you are connecting your speakers in the green slot or the same slot which is working for headsets, remember headsets can be used to check the output in the back panel of your cabinet as well as front panel of your cabinet.
6. Also check if there is any fuse in your speaker which has blown up so that you can replace it and it would start working, check the power cables and confirm they are not properly connected.

If the speakers work fine , then it's all ok , but if they don't you need to replace the speakers by checking them with your friend's pc or any other audio output device.
Hope his helps.

It is either that the device is bad or the driver not instal, first get the driver re-install. if this doest not solve the problem get a new sound Card

You need the sound driver I assume for this laptop. If it doesnt match hardware perfectly then nothing will work.

Go to vendors site with your S/N and Model number to locate the exact sound driver.

Have you checked in control panel / sound speech / sounds & audio devices / click on "sounds" blind and see if any of the sounds can be activated by clicking the big black arrow. If greyed out then the driver is not installed.

Check toshiba website for the drivers with your system model..

its a known issue --if you u upgrade vista home to vista ultimate.just u need to uninstall the audio driver and install it again

No Audio Output Device Installed
Some users have been experiencing problems with a "No Audio Output Device Installed" error when trying to play music, or when hovering the mouse over the speaker icon in the system tray. You may get a white X in a red circle to indicate this error.

Go to the device manager by pressing WINDOWS KEY + R to go to the run menu, and then run "devmgmt.msc".


From here, select your malfunctioning audio device(s) and make a note of the driver name. Then, right click on it and select Uninstall. This will remove the audio drivers from your system.


Once this is done, re-load the drivers for your sound card from the CD your manufacturer gave you with your PC or sound device. If you cannot find this, search for the driver on the manufacturers website using the driver name that has been written down. No Audio Output Device Installed
Some users have been experiencing problems with a "No Audio Output Device Installed" error when trying to play music, or when hovering the mouse over the speaker icon in the system tray. You may get a white X in a red circle to indicate this error.

Go to the device manager by pressing WINDOWS KEY + R to go to the run menu, and then run "devmgmt.msc".


From here, select your malfunctioning audio device(s) and make a note of the driver name. Then, right click on it and select Uninstall. This will remove the audio drivers from your system.


Once this is done, re-load the drivers for your sound card from the CD your manufacturer gave you with your PC or sound device. If you cannot find this, search for the driver on the manufacturers website using the driver name that has been written down.

Please uninstall audio devices By right click my computer.> Properties> Hardware> Device manager. Download drivers from web site. install it , Will work fine.
Regards
Rafique

windows key + R = open : devmgmt.msc
Sounds, video and game controlers > (right click) Realtek high definition audio > update driver sofware > browse my computer for driver software > let me pick from a list...> double click on Realtek high definition audio > YES to update driver warning > AND SWEET SOUND IS AUDIBLE :D