Troubleshoot No Sound from Classroom Speakers

If classroom speakers are not emitting sound, there are many potential causes. Rule out the simplest ones first.

Troubleshoot sound problems

• Crestron control systems include a No Sound feature; when selected, this will be indicated on the control panel. Press the No Sound button to deselect; the indicator will disappear, and the sound should resume. Use the Volume menu to adjust the audio level.
• For computer audio, find the speaker icon in the task bar (bottom right for Windows; upper right for Mac). A slash or X indicates muted audio. Click the icon to open the sound control and unmute. Use the volume slider to adjust the audio level. If the speaker icon does not appear, try signing out and back in.
• Select the correct input source. For classrooms with Dual Image or multiple displays, audio will come from the last source selected. Reselect the source for your audio and the sound may resume.
• If the classroom uses a handheld remote control, press the Mute button to verify mute status and use the Volume control to adjust the audio level.
• Check the audio controls in the application or website; the sound may be muted or turned down.
• If the above steps fail to resolve the issue, restart the audiovisual system and computer.
• If the issue cannot be resolved via troubleshooting, call 4-TECH at 410-704-8324 or use the CCLT chat service. Leave a note on the lectern to inform other instructors of the issue.