HP laptop speakers not working

If the stereo jack works, then there is no problem with the sound card or its drivers. Your speakers have played their last, most likely some internal wiring broken as speakers themselves rarely just quit.

I think you need to go to your sound settings and open the other soundport.

The sound power comes through a ribbon cable to the power button,along with the power supply switch wiring. This "power ribbon cable"( part # 431437-001) has frayed where it connects to the motherboard.
The new cable will cost you about $5 with free shipping on ebay and takes about 10 minutes to replace.
You can find step by step instruction on the repair by searching "dv6000 power ribbon removal".

You have two options (1) Troubleshoot the PC (2) restore factory settings

check external mic in another system.
update the bios of the sytem.
update drivers of sound cards

There should be a speaker mute switch (or fn key and F key combination). If that does not work, open the volume control and see if you in fact have it muted.

There are 2 volume control buttons on the laptop. 1 turns it up 1 turns it down. Try turning the volume up. It may be up high enough for you to hear with headphones but now loud enough to be heard through the speakers.

Does it stop if you mute the system?

Find a pair of headphones and plug them into the laptop and see if the buzzing continues in the headphones. If it does, it's a driver problem. Uninstall Audacity (which I don't think works too well with Vista, unless they've released a new version) to see if the problem goes away. If the buzzing is only occuring on your laptop speakers, but not in the headphones, then you may have blown them by using the wrong impedance out of your amp...

I rather suspect it's an audio driver problem. What happens when you remove Audacity?

First of all, check if the issue is with the Microphones of your Notebook.
Try disabling or turning off the Microphone of the Notebook to check this.
Additionally, try reinstalling the Audio Drivers of the notebook if possible by checking the Notebook driver page.

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