How to troubleshoot classroom audio signal

1.  Check the cables and connections – make sure the cable you use is connected properly and solidly.
2. Check to make sure you have selected the correct input button on the control panel for your connection type.
3. Check on the control panel for the audio Mute button status. Toggle the Mute button to unmute the audio.
4. Check the computer volume status, whether it need to increase or decrease, mute, or unmute.

Problem

Everything connected properly but audio does not work.

Solution

Step 1:  Open the computer audio settings by Right-click on the Speakers icon on the left side of the Windows 10 taskbar, and then from the pop-up menu on this icon select Sounds. The Sound Dialog window pop up.

Step 2:  Check if the Speakers/Headphones setting is enable or disable. Setting should be Enable for the audio to work. Right click to “Enable” the playback device.

Step 3:  If the Extron ScalerD (Intel’s Display Audio) show up as second device audio source, “Disable the Speakers/Headphones” to use the Extron Audio as default.

Step 4: If nothing works, Open the “Device Manager”, Navigate to Sound, video and game controllers, Update the driver or roll back a driver version for “Intel Display Audio and the Realtek Audio” if necessary.