Generally it’s really a common problem is that no sound from computer. I have just check some of the forum site and there are lots of computer user are keep asking about how do i fix the problem of PC sound not working properly.
Before you check anything else you should check out first that your speaker is in working order and first check out is that it should not be in mute level. If both are perfect than first go to the start button of your PC after that go in to the control panel and click on hardware and sound button and click on the sound button and check the master volume button it should not be in mute position. Keep play different track in your system and keep check the speakers are ok and also check that you must not install a hands free pin it may be the reason of it.
After checking the above thing if still your speaker is not working properly check out that have your recently did some unique changes in your OS? Have you installed new program or software or any new device in your laptop or in your computer. If the answer is yes than that is the reason of your PC sound is not working properly. To make sure about that problem than you should undo the software and then you should check the sound is it working if still the sound is not working after that then there is a problem of audio driver in your computer.
There are lots of computer user are facing the problem of sound card drive has been damaged because you have installed software that directly effect on your sound driver. Generally in that case you will see that everything is perfect but in most of the cases the device manager can’t find the problem of some drivers. There are more than 85% of computer sound errors are because of the outdated sound card and corrupted drivers. So to get the rid out of this problem just download the latest sound card and install in your PC by that your computer sound will start working.