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The audio output jacks on the back of your computer are for 5.1 speaker setup. Meaning that you have a speaker array of 2 front side speakers, 1 center speaker, 2 rear left and right speakers and a sub-woofer speaker. Here is a link to the set-up giude of your computer:
The set up should be as this.cable plugs into headphone jack on your pc. that connectects to your powerd subwoofer it is power correct! then your small speakers connect to the sub box or thew should? look on the sub box usually front and on the bottom.if thee actual speaker connections then they will be on the rear.
Although some monitors have built in speakers, most people have stand alone speakers. If the old monitor had built in speakers and now it is unplugged you won't hear sound. Even if the speaker cable is still plugged into the sound output on the back of your computer, the monitor must be plugged into an electrical outlet to have power.
I'd recommend buying a new set of external speakers if this is the situation.
If you never had speakers built into the monitor then normally changing monitors would make no difference whatever. The only explanation that makes sense under those conditions is that in the process of replacing the monitor, you dislodged the speaker jack from the sound output on the back of the computer.
Make sure your external speakers have electrical power plugged in, the power is on (green light on at least one speaker lights up) and the volume on the speakers is at least half way up.
Unplug the speaker from whatever hole it is plugged into and plug it firmly back in and test sound.
If still no sound other than some static on the speakers, try every single hole on the back of the computer that the jack will fit properly and test for sound.
do you have a 5.1 speaker??? if you do have try to install it in different channel if you have a 5.1 sound card you should have 6 channel for the mic , head phone , tweeter bass and surround ... if you only have 2.1 speaker try to put the speaker jack to different channel and check if it work... or try to reinstall the driver for your sound card...
Verify that all cables are plugged in correctly. Make sure the rear and/or center/sub audio cable is plugged in to the correct port. On most surround sound cards, the rear audio port is black, the front audio port is green, and the center/sub audio port is orange. If you do not have a surround sound card, make sure you obtain the proper adapter (discussed in the next paragraph) or use surround sound emulation if your speaker system offers it. If you are not sure if you have a surround sound card, please check with the manufacturer of your sound card for details.
Make sure your sound
card supports the same amount of channels as your speaker system
contains. For 4.1 systems, it should have a front and rear speaker jack
on the card. For 5.1 systems, the card should have a front, rear, and
center/sub, output. The card should be properly installed and configured. Please contact your sound card manufacturer for details. If you do not have a surround sound capable sound
card, you can use the M3D button on the controller unit (if you own a
z-560 or z-540) or use the source selector switch (if you own a z-5300
or x-620). If you do not have any of the models above, you can use an
adapter to split the signal for the front and rear speakers. This type
of adapter is a 3.5mm male to 2-3.5mm female jacks. You can purchase
this adapter at your local electronic store. Please refer to your
manual if you do not know if your speaker system can emulate surround sound.
Try connecting the speakers to a portable sound
device such as a walkman or portable CD player. Plug the speakers into
the headphone jack, but make sure the volume is lowered so the speakers
are not over powered. You can do this for both the front, rear, center/sub
speakers to verify that they work. If the speaker system works on the
walkman, then you are experiencing a configuration issue with your sound card. Please contact your sound card manufacturer.
Check the system Volume Control located in the System tray. Make
sure that the volumes are at a reasonable level and are not checked for