Most Samsung monitors don't have built-in speakers or volume controls. The audio usually comes from your computer speakers or headphones plugged into your PC. Check your computer's audio settings to adjust the volume there.

Here are a few tips for adjusting the volume on a Samsung monitor:

1. Use the monitor menu: Most Samsung monitors have an on-screen display (OSD) menu that allows you to adjust volume and various other settings. To access it, press the menu button on the bottom or back of the monitor, then look for a "Volume" or "Sound" option in the menu. Use the buttons to turn the volume up or down.

2. Use the monitor remote: Many Samsung monitors come with a small remote control. There are usually volume buttons on the remote that can control the monitor volume directly. Check if your monitor came with a remote and use it if so.

3. Use keyboard volume controls: If your monitor is connected to a computer, you can often use the volume buttons on your keyboard to control the volume of the monitor speakers. For example the F1-F12 keys, especially F10, F11, and F12 sometimes control volume up and down.

4. Adjust system/source volume: Make sure the device that is connected to your Samsung monitor, such as a computer or game console, doesn't have its system volume turned all the way down. Check the external device's volume controls and turn them up if needed.

5. Check connections: Make sure all cables from your source device to the monitor are properly connected. Sometimes loose cables can cause sound issues on monitors.