No sound on internal speakers

Yesterday I joined the "no sound on my PowerBook club"... like many times before I connected my laptop to my stereo via audio cable (3.5 mm male connector)... after I took the cable out I lost my Internal Speakers... in SysPref>Sound>Output I have only Headphones on the list... no internal speakers... I did a few things listed on the net (except of formating the drive) and I came to a conclusion that no one has actually solved this problem...
to sum up: I can use headphones and in that case there is no problem with the sound... but internal speakers are silent no mater what I do... I believe that this is a software problem, that somehow OS X thinks that the cable is still plugged in the audio port even when it is not...
please help

I recently had the same problem. Sound worked through the headphones, but did not work through the speakers when I pulled the headphones plug out.
Next clue was to have the Sound system preferences panel up on the screen. In working machines, inserting the plug into the jack causes the output display to change from "Internal Speakers" to "Headphones." In my case, there was never any change, the display always showed "Headphones" whether or not they were plugged in.
In most audio jacks I have seen elsewhere, the insertion of the audio plug moves a metal contact so that it is touching the plug, but that it breaks a connection inside the jack. It is this circuit break that is the electronic signal to change from speakers to the headphones plug. I suspected that there was something that was preventing the contact from re-connecting when the plug was pulled.
I used some professional dust cleaning material (canned compressed air or other agent, dry not wet) through a tube into the jack. After a liberal use, the "Internal Speaker" indication came back up on the Sound preferences output panel.
The system now works. The plug still feels a little spongy when inserted (as opposed to a distinct click at the end of the insertion), which may mean that there is still some stuff wedged in the back of the jack. Because of lack of tools and experience, I have not chosen to open up the case to visually inspect and clean around the jack.
But it works now, so I don't need to open it up.
Have fun,
Shaun
PB G4, 1.67 Ghz, 1GB Mac OS X (10.4.9)

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There are many possible causes for this issue. Take each of the following steps that you haven't already tried. Some may not apply to your model. Back up all data before making any changes.
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10. Start up in safe mode. Don't log in; just restart as usual when the login screen appears. When you do, make sure the words "Safe Boot" do not appear in the login screen. If they do, the system is still in safe mode and sound won't work.
11. Reset the NVRAM.
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Hi,
I hope you can give some advice.
New to all this so apologies if protocols are broken etc
New 20" imac, running Leopard.
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Check the link below:
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** Make it easier for other people to find solutions, by marking my answer with "Accept as Solution" if it solves your issue. **

No sound from internal speakers or headphone jack

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Hi,
Can you post back with the full Model No. and Product No. of your Hp 15 series notebook - see Here for a guide on locating this information.
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****I don't work for HP****
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Here is one that worked for another user it may work for you
ObiJuan2080Sep 3, 2012 2:02 PM Re: internal speakers no sound
Re: internal speakers no soundin response to noondaywitch | This solved my question
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First pluging is headphones and then unplugging it. If yu can't get it fully inseted tham may indicate that end of a plug is broken off inside the jack.
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Welcome to the discussions Mark.
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Unless you're still under warranty, plugging in and out is the only solution I've come across
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1. Reset PRAM. http://support.apple.com/kb/PH14222
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Can I disable broken headphone jack? and get sound to internal speakers?

HP G72T-200 CTO Notebook PC WINDOWS 7
My laptop has a broken headphone jack (piece of plastic fell out of it) and thinks there is something plugged into the jack and won't default to the internal speakers. I've rolled back, reloaded drivers, run audio sound fix it thing, etc. Headphones will work if you hold plug and jiggle to the side. Is there anyway to just disable the jack so I can hear sound through the internal speakers?

Hey TR,
21Jan...
Can you stick a powered speaker on that jack and fix it so it doesn't wiggle much until you can get it fixed?
22 Jan...
The only fixes I have found for this are for Linux.
One can risk a registry fix, though I've not found a sure way to do it. The fix depends on knowing your sound card (I do not), and knowing the exact entry fix (I might, but I won't risk your system).
My sage advice is to get it fixed and be done with it.
It is my pleasure to assist.
Say “Thanks!” by clicking the Kudos Star to show your appreciation for the help.
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Kind Regards,
Dragon-Fur

No sound on internal speakers

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