If there is a driver needed ?
Click
start control panel administration tools computer management device manager
scroll to sound video and game controllers you might see a yellow question /
exclamation? ! mark or a red X Right click to reinstall drivers
If
your computer came with a motherboard disk the drivers could be on it
or
you might download slimdrivers.
Rather doing a driver hunt
http://download.cnet.com/slimdrivers-free/3000-18513_4-75279940.html
Windows XP/Vista/7/8
Note: it will find all of your outdated drivers
This is a
free driver solutions
which will automatically search for and find the
correct driver
You
will have to update every driver individually once you update you might be
asked whether you want to restart or make a system restore point.
Click
no to both of these then continue updating each driver free then restart once
all of the drivers have been updated.
It might take some time being free
The headphone jack on the computer connects to
the sound card, a hardware device that controls audio input and output on the
PC.
The card contains a digital-to-analog converter
that converts analog audio into digital signals and visa-versa.
The performance of the headphone jack, therefore, depends on
how well the sound card functions; if the card doesn't work, then the
headphones connected to the PC won't output sound.
Reconfiguring the audio settings will often fix problems
with audio output on the headphone jack, but if the former fails to resolve the
issue, replacing the sound card in its entirety is sometimes the only means of
repair.
Click "Start." Enter "sound" into the search box. Select
"Sound" from beneath Control Panel.
Double-click "Headphones."
If no "Headphones" option is available,
double-click "Speakers."
Click "Properties" on the General tab.
Check the Device Status field for errors. Look up the
message on Microsoft Support for more assistance, if applicable.
Close the window if the Device Status field reads "This
Device Is Working Properly." Go to the "Levels" tab.
Click the speaker button to unmute the volume if the icon
contains a red circle-backslash symbol. Drag the top slider to the right to increase
the headphone volume.
Go to the "Enhancements" tab.
Check "Disable all Sound Effects." Go to
Applications, and then clear "Allow Applications to Take Exclusive Control
of This Device."
Click "OK" to close Headphones Properties or
Speakers Properties.
Test the audio.
If the headphones fail to output sound, unplug the
headphones from the computer.
Reconnect the headphones to the PC.
Headphone jacks are color-coded lime green on most PCs.
Look for the headphones symbol if the jacks are not color-coded.
Plug the headphones into the line-out port on the back of
the computer if the headphone jack on the front of the PC fails to work, or
visa-versa.
Test the headphones.
If headphones still won't emit sound, the sound card most
likely requires replacement.
Replacing the Sound Card
Shut down the computer. Remove the power cord from the back
of the PC.
Disconnect the keyboard, mouse, monitor and all other
peripheral devices.
Loosen the screws found on the back of the case, then slide
the cover panel off of the case. Touch the chassis to protect the hardware from
electrostatic discharge, or ESD.
Set the computer on its side.
Locate the sound card found on the opposite of the audio
jacks and loosen the screw that secures the card to the computer.
If no expansion card is located opposite the jacks, the
computer uses an integrated sound card which can't be removed.
Remove the new audio card from its protective packaging.
Line up the card with an available expansion slot on the
motherboard, then push the card down into the slot to install the new audio
jacks.
Screw the card to the computer case.
Reassemble the computer.
Turn on the PC. Boot in to Windows and insert the CD that
came with the new expansion card. Follow the onscreen instructions to install
the sound card software to the computer.
Plug the headphones into the new line-out jack.
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