Take it back to the place that should have fixed it and get them to do it properly this time.
The way you can tell if your PC motherboard has a built on sound card is by looking at the ports on the back of the PC. Above is a picture of a sound card. You will see blue, black, green, orange, pink, and grey colors the colors you see are the sound ports where you plug in your mic, headphone/speakers etc.
A sound card
It is a bit of hardware inside your computer to translate sounds to electronic signals and back under control of a computer program.
First your PC must have a sound card and speakers. Then check the volume control on your PC. Not all vids on Facebook have audio.
If you performed this task with the computer running (power on), you may have shorted out the sound card. Always, when installing or removing any electrical/sound connection from the back of a PC, turn it off first.
most likely the hard drive going bad. back up your data.
Ask the IT Department.
far west
Empire total war has no sound, no nothing, and then my pc has no sound, i have to reboot my computer to have windows sound again
It depends on whether you are using a Mac or PC. On your PC all you need to do is go into the control panel and then under the sounds option. Make sure that your speakers are turned on and plugged in first.
what are the ports, cable and wires of the pc