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The obvious, is it muted? NO. Disable device in Device Manager, enable device, no change, uninstall audio device, reboot, I don't know your OS, your OS should automaticly ID the audio an add driver. If it does not go to Acer website a download audio driver for your OS. Install manually. You stated,"after installing a hard drive I had from another laptop" . The Harddrive you installed, did you format it and install into this laptop and clone the drive? I am a bit confused by the statment, "after installing a hard drive I had from another laptop"?
the official website say that aspire 1640 doesn't support win 7,but try this one,download it and install it global-download.acer.com/GDFiles/Driver/Audio/Audio_RealTek_126.96.36.19991_XPx86.zip?acerid=633640461727576652&Step1=Notebook&Step2=Aspire&Step3=Aspire%201640&OS=X01&LC=en&BC=Acer&SC=AAP_1
You need to install the support programs for your laptop motherboard. These are also called your "laptop driver software" which is usually shipped or packaged with your laptop. In this CD or DVD Installer, all hardware devices must be well supported by their compatible software drivers.
Now look for the CD/DVD Installer and install the drivers.
hi im josh in cebu phils.may i help you? Friend audio device was not working? Friend your audio driver was installed but it still not working because you need to activate or run it manualy so that it will work. All you have to is go to my computer right click go to device manager then click to view devices locate the sound card icon click and go to update/install driver then if browse locate the drive c where the software driver installed open the folder click the run/setup.then it will update wait until it finish then reboot your pc.then it will solve the problem.good luck friend hope i helped you.
It sounds like you have not properly installed the audio driver. You have to go in device manager and see if you have any question mark in any of the devices or the audio. To go to device manager you hit start then control panel and then click device system and then click device manager.
First check the controlpanel there is an option to take Sounds And Audio Devices Properties. then click on the AUDIO tab, check the Default Sound Playback Device.select the correct Audio divice.if the problem persist do the driver for sound ( multimeadia audio driver) from the acer driver cd.then try.