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First right click my computer then click properties then hardware then device manager and expand the sound video and game controller and see if the driver is marked with yellow question mark or marked with red X then you will have to reload the drivers and if you dont see any audio drivers then switch of the computer press del and enter bios and enable the audio device then click the volume control in theoolbar and check wether mute is clicked if clicked remove them and adjust volume slider to high
go to the Control Panel and locate the icon for "sound and audio devces".
Select the tab marked audio and look for the tab marked "sound playback" look at the pull down and see if what device is connected (if any) if not select your audio driver (this could be listed as many different things ----a common one is "Realtec"). This should do it (i am assuming the sound works on other things. If this doesn't work select the tab marked hardware and make sure all are working and if not use the troubleshooter to repair
Right click to My Computer Manage Device manager In the right panel you will see all the drivers installed If there is a question mark, or an exclamation mark beside of any of them, the driver is not OK A question mark means that the driver is not installed at all, and that your machine doesn't know what device is it. Exclamation mark means that the driver has been installed, but that the driver is not good. Sometimes, there is a red cross over the device - the device is turned off
Check the device manager to see if its still recognizing the usb port or if *** has an exclaimation mark next to it.or a question mark the question mark means it cant find the usb and the exclaimation mark usually means a driver error. then check the usb driver. check Hp for a driver update.
You will need to reload the drivers for your audio device. Where you saw the exclamation mark, if you right click, properties, you should see a tab for reinstall drivers. This should take care of your problem. (As a back-up, if the reinstall does not work, check the Acer support page, and download the drivers for your model notebook.) Good luck.