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Have you tried to unplug the computer from the AC, wait a few mins. and plug into AC, reboot. If that fails open Device Manager, Sound Device, uninstall, reboot, install driver if necessary. This computer has a few miles on it, Right? You may need a sound card, it's hard to say for sure. Why a Trojan Remover? FYI, you can find many excellent programs,freeware, here: http://www.filehippo.com/. MALWAREBYTES, CCLEANER, Anti Virus.....etc. freeware.
Please restart the computer and while it is booting enter into safe mode by pressing f8 repeatedly. It will eventually it will ask you to enter safe mode. Enter safe mode option(not with networking or anything else) log back in. See if the computer freezes at this point. If it does not freeze after being on for an extended period it is more then likely a bad windows install or a virus. If it does the same thing we could be talking hard ware issues.
1. Cable connection of the speaker to your computer and the power cable if its plug in correctly. Normally the Audio cable of the speaker is plugged into the green audio port on the computer.
2. You speaker is on mute. Check the speaker icon located on the lower left side of you desktop. If its on mute then try to un-mute the volume and test the speaker.
3. The driver is not installed properly. Check the device manager if there is a Question/Exclamation mark on the Audio devices.
4 If everything are Ok. try to plug the Audio cable of the speaker to any of your Portable sound devices like Ipod. If that still does not work then you need to replace the soundbar. Contact Dell for a free replacement if still under warranty.
Make sure the mic is plugged in to the purple jack on the back of the machine - also make sure that the mic port is selected for recording - check control panel -> sounds and audio devices -> advanced under "device volume" - this will bring up the Volume Control - select Options -> properties -> recording and make sure that the Select box is checked under the microphone slider.
If you were just messing around with the keyboard, you have have just muted your audio output. You may even see in the lower right corner of your screen a red circle with a line through it over the volume control icon. Laptop keyboards have function keys that let you mute your audio from the keyboard. Go into your control panel and click on the sounds icon, see if you have the mute box checked and uncheck it to un-mute your audio
Hi.... Do you have sound at all e.g. can you play your music (windows media or similar) etc? If not
You can go to Dell website and download the sound driver for your particular computer. Otherwise check your sound manager in your control panel....you may have muted it accidentally.