I would check your cables to see if they are loose (on both ends). Next check that windows is actually making noises. go to control panel and then sounds. Make sure that the volume is up and not muted. Then try it with another speaker or headset plugged in. That should tell you if it is the monitor or the pc that has the problem. Some monitors with speakers have a setting that disables the speakers so you should check that as well. On the pc it can be a driver problem or hardware. Usually the driver gets corrupted somehow and the sounds goes off. In that case you need to reinstall the sound drivers and it should fix it.
Chances are you need to connect your monitor speakers by way of a USB cable. Look for a USB port on the monitor, connect it up and run the software that came with the PC to install the software to direct your sound to the monitor speakers.
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I would check your cables to see if they are loose (on both ends). Next check that windows is actually making noises. go to control panel and then sounds. Make sure that the volume is up and not muted. Then try it with another speaker or headset plugged in. That should tell you if it is the monitor or the pc that has the problem. Some monitors with speakers have a setting that disables the speakers so you should check that as well. On the pc it can be a driver problem or hardware. Usually the driver gets corrupted somehow and the sounds goes off. In that case you need to reinstall the sound drivers and it should fix it.
Chances are you need to connect your monitor speakers by way of a USB cable. Look for a USB port on the monitor, connect it up and run the software that came with the PC to install the software to direct your sound to the monitor speakers.