Speakers not working vgn

Yes your laptop's original Audio driver is not realtek, that is Sigmatel Audio, so you download your laptop's driver here:
http://esupport.sony.com/US/p/model-home.pl?mdl=VGNSZ430NB&template_id=1&region_id=1&tab=download#/downloadTab

check heead jack

please connect headphone in your laptop head phone jack and check sound


please vote me

Hi,

Try the steps below, this should work:

1. Restart the computer.
2. Check the system volume to make sure the volume is not muted or too low.
3. Ensure the volume control dial on the left side of the front panel is increased to an audible level.
4. Plug in a set of headphones to see if there is sound through the headphones. NOTE: If there is sound through the headphones, the issue is with the speakers.
   
5. Ensure the playback device is correctly selected .
6. Select a sound scheme in Control Panel.
7. Reinstall the sound drivers.
8. Check for conflicts in Device Manager.
9. Remove all added hardware to see if it is conflicting with the sound card.
10. Reset the BIOS to the default values.
11. Use the System Restore utility to restore the system back to a point when the sound last worked properly.

Download and install the Audio drivers from the below link:

http://esupport.sony.com/US/perl/swu-download.pl?mdl=VGNT350P&upd_id=1670&os_id=7


Thanks!!!!

Method 1: Restart the computer Restart the computer at least one time after you install a Windows Vista service pack to verify that all processes related to the installation are complete.

After you restart the computer, determine whether you can hear sound. If you can hear sound, the issue is resolved. If you cannot hear sound, try Method 2. Back to the top Method 2: Try another sound deviceIf it is possible, try plugging a different sound device into the computer. For example, if you were using speakers, try a different pair of speakers or a set of headphones to make sure that the problem is not related to the sound device.

Determine whether you can hear sound. If you can hear sound, there is a problem with the original sound device and the issue is resolved. If you cannot hear sound, plug the original sound device back into the computer, and then go to Method 3. Back to the top Method 3: Unplug the computer speakersUnplug the computer speakers or other sound devices that you may be using, such as headphones, from the computer and then plug them back in to the same port. Most sound cards that are compatible with Windows Vista include a feature that detects sound devices plugged into the audio jack. This procedure may prompt the audio detection feature to detect and configure the sound device to make sound.

Determine whether you can now hear sound. If you can hear sound, the issue is resolved. If you cannot hear sound, try Method 4. Back to the top Method 4: Verify that the default sound device is set correctlyAfter you install a Windows Vista service pack, you may find that the default sound device, also known as the playback device, was changed. You may also find that the sound quality has changed. Make sure that the default sound device is set correctly for the sound device that you are using. To set the default device, follow these steps:

1. Click Start , type Sound in the Start Search box.
2. Click Sound in the search results at the top of the Start menu.
3. Click the Playback tab. Notice the check mark next to the default device. For most users, the default device is Speakers. Make sure that your audio settings are configured as expected. Follow these steps:
   1. On the Playback tab, select the playback device, click Properties, click the Advanced tab, and make sure that the Default Format is set to the value that you expect. When you finish, close this window to return to the previous window.
   2. On the Playback tab, select the playback device, click Configure, and then make sure the configurations are set correctly.
   If the sound settings are set correctly, you are using speakers as the sound device, and your speakers are already set as the default device, go to method 5 now.
4. Select the sound device that you want as the default sound device, and then click Set Default.
5. Click OK to save your settings and to close the Sound dialog box.

Determine whether you can now hear sound. If you can hear sound, the issue is resolved. If you cannot hear sound, try method 5. Back to the top Method 5: Verify that a sound driver is installedWithout a sound driver, you will not hear sound. Make sure that a sound driver is installed. To do this, follow these steps:

1. Click Start , type Device Manager in the Start Search box, and then press ENTER.
2. In the Device Manager dialog box, expand Sound, video, and game controllers.
   
   If there is a speaker icon next to the sound driver, the driver is installed. If there is a yellow question mark next to the sound driver, the driver is not present or will not load.

Go to method 6 to reload the current sound driver and test for sound. Back to the top Method 6: Reload the current sound driver If you discovered in method 5 that the sound driver was not installed, or if you discovered that the sound driver was installed but is not working, try to reload the sound driver. To do this, follow these steps:

1. Click Start , type Device Manager in the Start Search box, and then press ENTER.
2. In the Device Manager dialog box, expand Sound, video, and game controllers.
3. Locate the audio device that was included with the computer.
4. Right-click the device, and then click Properties.
5. Click the Driver tab, and then click Uninstall.
6. Make sure that the Delete the Driver Software for this device check box is cleared, and then click OK.
7. In the Device Manager dialog box, click the Action menu, and then click Scan for hardware changes.
   
   You receive a message that states that a hardware device is being installed, and then the uninstalled audio device appears in Device Manager.
8. Close the Device Manager dialog box.

Determine whether you can now hear sound. If you can hear sound, the issue is resolved. If the current sound driver did not reload or if it did reload, but you cannot hear sound, try method 7. Back to the top Method 7: Update the current sound driver If the current sound driver does not seem to be working, see whether there is an updated sound driver that you can install. To request an updated sound driver, contact the manufacturer of the sound driver.

For information about how to contact hardware and software vendors, visit the following Microsoft Web site: http://support.microsoft.com/gp/vendors/en-usNote In some cases, the manufacturer may instruct you to uninstall the current sound driver and to delete the driver files. To do this, follow the steps in method 5, but at step 6, click to select the Delete the Driver Software for this device check box.

Try downloading and installing the Driver.

Download the Driver here.

If not working..you can try this Driver.

Download the Driver here.

go conter panel and look sound setting option and correctit 2/ look speaker isnot in mute?3/look device manager sound is stall or not. if not stall yellow sign indcated not install. or dim sign in control panal indecated properly sound driver is not instaling.

If the sound was working before you reloaded VISTA, you have driver problems.
The best way to fix your problems is to check your device manager for flags and if found, remove them.
Next, go to sony's website and download your VISTA drivers and install them.
Do you see a speaker on the lower tool bar ?

Try going into the device manager and removing the sound driver. Hopefully you have the sound card driver. Then reboot the Pc if the system installs the driver software and you hear noise your good. If that doesn't install it from your cd. If it works try uninstalling the program that caused the problem.

Alright, I got the answer for ya, first, go into your control panel. Click on Sounds and Audio Devices. Listed in this window should be the name of your sound card. Under that, should be Device Volume, and at the bottom, should be the Speaker Settings, click into Advanced, next to speaker volume. It should show you a diagram of a monitor with the amount of speakers it has selected shown next to it. Where it says Speaker Setup, click and then scroll down until you see 3 settings labeled Monitor Stereo, Monitor Stand Stereo, and Monitor Mounted Stereo. Whatever one enables the sound will be the one you want to stick with.

did u install sound card drivers
if u install correctly go to control panel and sound
check there whether audio device is showing or not. if not u didnt install ur audio otherwise u installed correctly but the problem is in ur speaker.