Question about Acer Aspire (AST180-US340B) PC Desktop

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Speaker My laptop model is Aspire Acer 4720z. It doesn't have a sound unless you attach headphones or an external speaker. If I remove these devices I wouldn't here anything. But the volume is not in mute.

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  • iris_ona Dec 19, 2008

    i cant hear anything from my laptop.



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Hi could be a few thing loose cable damage speakers or sound card, or setting -driver new resetting 

Posted on Dec 05, 2008

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Why does the audio cut out on acer z5700 speakers when you connect to a source at the audio output in the back.(expect this only when you connect headphones to headphone input)


When you connect headphones to your computer the computer will only send sound through the headphones and not allow sound to come out of the speakers. this is the way almost all audio drivers are setup, it detects the speakers and the headphones as 2 different devices and will only play sound through one (headphones first and if there are no headphones then speakers).

The only way I know to resolve this (and I hate this suggestion) is to purchase a headphone splitter. Connect the speakers and the headphones through the splitter, the quality of the splitter will determine the quality of the sound.

You could try going to the audio driver options (if there is any program installed by the audio driver) to see if you can get it to play through both but with both my Acer laptops I have been unsuccessful.

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Go to Control Panel -open "Sounds" folder and you should see "Headphones" in the list under "Speakers". There will be a green tick on the "Speakers" symbol. Right click on the headphones symbol and then click "Set as Default device". Click OK and the headphone socket should now work correctly. It sorted my problem. If you want to go back to using the crappy internal speakers follow the same procedure setting the speakers as your default device.
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There is no sound on my computer


1. Open Device Manager by clicking the Start button , clicking Control Panel, clicking System and Maintenance, and then clicking Device Manager.‌ If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
2. Expand the Sound, video and game controllers category. If a sound card is listed, you have one installed. If no sound card is listed, You will need to install one.

3. Right-click the name of the sound card, and then click Properties.
4. Click the General tab, and then look in the Device status box to identify problems with the sound card.
• Make sure your speakers are plugged into a working power source and turned on.
• Make sure your speakers are correctly connected to the computer.
On your speakers, find the cable that plugs into your computer. Make sure that the speaker cable is plugged into the speakers and the correct jack on the computer.
• Make sure that the speaker volume is not muted or turned down too low.



1. Open Volume Control by clicking the Start button , clicking Control Panel, clicking Hardware and Sound, and then, under Audio Devices and Sound, clicking Adjust system volume.
2. Under Main Volume, move the slider up or down to raise or lower the volume.
NoteSome mobile PCs have an external volume control on the outside of the case. If you're using a mobile PC, check the external volume control. • Make sure your headphones are not plugged into the line out (headphone) jack of your sound card or computer (unless you want to be listening with headphones rather than speakers). When you plug in headphones, most computers automatically cut the sound to the speakers.

thank you

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My laptop model is Aspire Acer 4720z. It doesn't have a sound unless you attach headphones or an external speaker


If you press the FN key + F8 key they are the ones that toggles the speakers on and off. There is nothing wrong with your speakers.
God Bless Greg

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