No sound on integrated speakers

You should first re-install the audio driver, or alternately you could remove it in "Remove a program". If you do a simple un-install without removing it, when you re-boot Windows will re-install it which will reset its settings to the default ones. Or if you remove it and reboot then Windows will install its basic audio driver. In either case if you still do not get audio from the speakers then you might have the problem I will describe below.

*************************************************************************************************************

Dell laptops with HD audio (all models newer than the Inspiron 9300) utilize switching technology in the headphone jack, which is somewhat complicated. In addition to the usual mechanical parts, the jack also uses current & impedance-sensing techniques to trigger software configuration and switching (to send the audio signal to the speakers). Sometimes the laptops with these jacks develop this combination of symptoms:

    * Speakers don't work and are not muted or deselected
    * Headphone jack does work
    * Reinstalling audio driver does not help
    * Audio test in Dell Diagnostics passes
    * On models with 2 headphone jacks, one may be "checked" in the control panel as if in use
    * Sometimes but not always, a very gentle wiggle of a plug in the jack will get it to resume normal functioning, at least temporarily.


That combination of symptoms means that the sense pin in the jack is not working for some reason. Failure of the sense pin results in the computer behaving like there is always a plug in the jack. The software switch that should route audio to the speakers does not get triggered.


There are 3 ways to confirm that you have a failed sense pin:

1. Check for the combination of symptoms that I listed. If you have all of them then it is pretty certain you have the failed sense pin. Note that when you run the audio tests in Dell Diagnostics you should hear audio through the speakers. That is the opposite result from what one would expect. But note that if you do not hear the audio through the speakers during the tests then there is some other hardware problem, not a bad sense pin.

2. Replace the headphone jack. If that fixes the problem that confirms that you had a failed sense pin.

3. Restore the laptop to its original factory configuration. This is called PC Restore in XP and Factory Image Restore in Vista. If the speakers still don't work after PC/Factory Image Restore and you have the combination of symptoms listed above, that is a definite confirmation of a failed sense pin.

The only way to repair a jack with a failed sense pin is to replace it. Changing the jack on most models requires replacing the motherboard, but some models have a jack daughter board that can be replaced with a new one. See down below for a list of models with replaceable jack boards.

***********************************************************************************************************


How to Run the Audio Tests in Dell Diagnostics

These interactive audio tests are designed to narrow down the problem to either the software or hardware. The tests are independent of Windows and drivers, meaning it doesn't matter if those are working correctly or not. To run Dell Diagnostics

1. Restart the computer and tap the f12 key as soon as it starts to boot up .
2. Select 'Diagnostic' from the boot menu. The computer will run its pre-boot assessment tests (PSA) before Dell Diagnostics starts. During the PSA you will hear some tones through the system speaker but this does not adequately test the audio hardware. Dell Diagnostics plays an instrumental piece of music complete with drums, so if you only hear some tones then you have only run the PSA.
3. Dell Diagnostics should open after the PSA tests, or you should see an option to open it. If you have ever reformatted your entire hard drive then Dell Diagnostics will no longer be there as an option. In that case run it from the Drivers and Utilities (Resource) CD if you have one.
4. Select 'Custom', then the audio tests.
5. The tests will run. You don't need to run all of them. Just check whether or not audio comes through the speakers during the tests.

If you hear audio through the speakers during the tests (the tests 'pass') but not after you boot back into Windows, that result means that you have a software problem. Normally the  software problem would be in the audio driver, but if you have the rest of the combination of symptoms then the software problem is that the software switching is not working. But it is not working due to a hardware problem -- a failed sense pin. Dell Diagnostics cannot directly detect a failed sense pin. That is why Dell Diagnostics produces an opposite result than what one would expect when there is this particular hardware problem.

******************************************************************************************************