Audio Troubleshooting & FAQ

Purpose

This document provides troubleshooting steps for common classroom audio issues, including audio from a Windows 10 computer, external HDMI or USB-C devices, and external 3.5 mm audio devices.

Scope

This document applies to Palomar College classroom AV systems that use ceiling speakers and an Extron HDMI audio playback device.

Procedure

Question: Why can't I hear any audio coming through the ceiling speakers?

Step 1 - Check Audio on a Windows 10 Computer

Verify the Windows volume is set to 100% using the volume slider in the lower-right corner of the desktop.

If needed, press the Windows key and search for sound settings to open the audio settings.

In the sound control panel, verify that Extron HDMI is selected as the audio playback device.

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Screenshot showing the Windows volume control set to 100 with Extron HDMI (Intel(R) Display Audio) selected. The speaker icon and device selector are indicated with arrows.

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Screenshot showing the Windows taskbar with an arrow pointing to the speaker icon in the lower-right corner.

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Screenshot showing Windows search results for the term sound, with Sound Control Panel selected as the best match.

Step 2 - Check an External Video/Audio Device or Laptop

For a device connected by HDMI, Mini DisplayPort, or USB-C, verify that the audio output device is set to Extron HDMI.

Do not select headphones or speakers as the output device for this connection type.

Screenshot Alt Text:

Screenshot showing Extron HDMI (Intel(R) Display Audio) selected in the Windows volume control and the volume set to 100.

Step 3 - Check an External 3.5 mm Audio Device

For an external device connected with a 3.5 mm / Aux / headphone cable, verify that the audio output device is set to Speakers/Headphones.

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Screenshot showing the Windows volume control with Speakers / Headphones (Realtek Audio) selected as the audio output device.

Step 4 - Connect and Select an External Device

Connect the laptop, USB-C enabled smartphone, or tablet to the classroom AV system using the appropriate connection.

On the AV system control panel, select the source that matches the connected device.

Need Help?

If you experience issues, submit a ticket through helpdesk (https://help.palomar.edu/)