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if you are using vista or windows 7 it you may want to check what device is selected under sound properties, rigth click the icon of the volume then select playback option then if headphone is the ont that has a green check means defualt device ,try to select the other device for speaker to make default then try to play it again, if it will not resolve the issue it means u have to replace the speaker already.,
Fred if you get sound to your headset from the same port you get no sound for your speakers, it is the speakers and not your headset. Are there any speaker lights on at all? If not maybe your power supply for the speakers is bad.Try a different set of speakers in the same computer and see what happens. If they work, the speakers are bad. Otherwise you have some strange connection problem.
maybe you have a piece of your head phone jack stuck in the port, does the sound still come through the headphones if you re insert them? or have you tried control panel sounds to see if your default speakers have changed ?
If you can here sound in headphones, but not through the speakers, most likely the phone jack switch is bad. The whole jack needs replacement. Also, in some cases, it could be more then that, like Audio CODEC chip on motherboard is bad, but lets assume the best.
Your speakers are frying, hence the crackling sound, as this is a frequent problem owing to the location of the speaker assemblies and the sound output in an area of the system where the ambient heat exhaust vents are located.
I am a bit confused, though, as to why you get no better sound through headphones or external speakers, since this is not usually the case in this frequently cited problem.
One possibility is that not only are the speakers, but the entire sound output assembly.
Warrantee work if available, if not try a shop where they also sell used Dell computers as they will have pulls that could cut your losses.
1) Go to sleep mode - wake up ! - tada !! the headphone jack will work again .. I know it sounds crazy.. i have the same model and had the same problem.. usually restarting solves any problem, but this time even a restart did not worked while putting the laptop on standby(sleep) mode and waking it up worked !!
2) If the above does not work, uninstall the sound drivers from device manager - restart the computer - then let windows detect appropriate drivers by itself. Sometimes the Sigmatel drivers(which are provided by dell) do not work as well as windows vista's HD sound drivers. May solve the issue... Do not worry doing this, in the worst scenario you can always download and reinstall the dell drivers from dell support page.
Please update on firstname.lastname@example.org if the problem gets solved..
1. Click START
2. Click CONTROL PANEL
3. (Switch to CLASSIC VIEW)
a. Click on SOUND
b. Click on PLAYBACK Tab
c. Click on SPEAKERS/HEADPHONES
d. Click on PROPERTIES
e. Click on CUSTOM Tab
i. Make sure PC SPK MUTE is NOT checked
f. Click on LEVELS Tab
i. Slide PC SPEAKER to 100%
ii. Don’t worry about the SPEAKER slider, it’s controlled by the keyboard buttons
g. Click on ENHANCEMENTS Tab
i. Make sure LOUDNESS EQUALIZATION is checked
h. Click OK
i. Click OK
4. Close CONTROL PANEL