My built in speakers arn't working

Hello, Just looking for some advice.
I have just had a new hard drive fitted into my mac book as the previous one had died.
Normally i link my macbook to my HiFi via the aux setting on the hifi and usinga headphobne jack into the headphone socket on my macbook. I have done this since having the new hard drive but last night i unplugged it and the built in speakers weren't working.
The headphone socket now has a red light in it and when i go to the sound specification in the prefrences menu it says that the device has no built in speakers?
what have i done? Should i take it to a shop?
apologies it it is utterly obvious im just not a wizz.
Thankyou!
Ruby xx

Hi there,
I've got quite a similar problem. Yesterday I rebooted my MB because two programs crashed. The first strange thing which happened was that the start up process took ages. Afterwards, like five minutes, the sound symbol in the status bar had disappeared and I couldnt find any sound output devices within the sound menu. I've read lots of posts to this topic and in most ones they talked about a red light within the headphone jack, which isnt true for me.
I've tried a hardware check as well as PRAM reset and all those things but nothing helped. Has anybody an idea what went wrong/ what I can do? Im going insane without music.
Kind regards,
philo

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HT3159 my built in speakers ar no working can you help thank u

my built in speakers ar no working can you help thank u

Things to try:
Quit all applications, disconnect all peripherals that may be plugged in, reboot
Try going to System Preferences/Sound/Output and see if you can select built in speakers
Try taking a set of headphones and plugging them in and out several times
Trya pram reset:
Power off, power back on holding the following keys:
OPTION COMMAND P R
Continue to hold these keys till you hear the start chime 2 times then release, reboot.

Macbook Pro 17" - My built in speakers are not working.

Macbook Pro 17"
My built in speakers are not working.
The speaker logo is not highlighted (grey not Black) and when in sound options "output" pane only displays the digital out for 'optical' - ie, the internal speakers dont register (headphone socket works)
Any ideas?

1. If red light is visible in the headphone port, plug the headphone into and out of the port 5 or 6 times
     to flip the microswitch inside the port. Hopefully that will make the mode revert back to analog from digital.
2. Reset PRAM. http://support.apple.com/kb/PH4405
3. Reset SMC.   http://support.apple.com/kb/HT3964
     Choose the appropriate method.
Hope any one of these steps helps.

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My Built-In speakers don't work on my Macbook Pro anymore.
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Is there a red light glowing inside the jack? It sounds like a faulty jack. Read this:
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Have you tried a PRAM reset?
http://support.apple.com/kb/ht1379
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Please help;
Built-in speakers not working after using audio port to run remote speakers.
I tried using the FAQ in iTunes to solve problem. Built-in speakers will not play sound.
Under system prefs., sound, the device shows; Digital Out under port; Built-in Output
Under settings for the selected device;
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Check out this post...
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Hi. I just turned on my Macbook Pro today and found something funny. My internal speakers will not work and when i try to use the volume keys the display comes up for volume but it has the do not enter icon. i plugged my headphones in to see if it worked and it did. i also noticed that there is a red light coming from my headphone jack when the headphones are not in it. Does anyone know how to get my speakers working again?? I looked at the help files and it says to make sure that internal speakers is checked in the : system preferences->sound->output. but all there is to check is: digital out.
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Check to make sure that digital out is NOT selected - your headphone port is also a optical digital audio port - hence the red light.
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K, so last night I tried the home+sleep/wake button hold thing and reset it that way and also just normal shutoffs which didnt fix it and also tried the ideas that you guys said and no go. everynow and then it would make the sound when I unlock it. so i just left it on and let the battery die see if that would do something it got to 10% and shuts off i guess so then i charged it on my stereo system with an ipod dock and was listening to music then i disconected it and to my suprise it started playing through the internal speakers again. I was skeptical at first so I turned it off and tried again it worked. so i went to the app that I think caused the problem in the first place called digidrummer lite I was able to hear the drums tom toms etc went to the home menu tried again played that app once more but this time there was no sound. I went to my music and everynow and then it would play but fade out or not play at all. so I took digidrummer off and so far the speakers are working again but I will still need to test them more.

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i have a macbook , 10.4.10, 512mb ram, 13'' and the speakers aren't working, a red light is
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The red light means it is in digital mode. It is controlled by a switch in the headphone jack when an optical plug is inserted. Sometimes the switch sticks. Plugging and unplugging headphones might reset the switch. If not, try poking around in the headphone jack with a toothpick.

My built in speakers arn't working

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