A user reports that the projector in the conference room displays the presentation correctly, but no sound is coming from its built-in speakers. You confirm that the projector's volume is turned up and it is not muted. Which of the following should you check NEXT to continue troubleshooting?
Reinstall the audio driver on the computer connected to the projector.
Confirm that the computer's audio output is set to the projector instead of its internal speakers or another device.
Restore the projector to its factory default settings.
Verify that the audio (or HDMI) cable is securely connected to both the computer and the projector.
If the projector shows video but no audio, the next logical step is to verify the physical audio path. A loose, damaged, or incorrectly connected audio (or HDMI) cable is one of the most common causes of this symptom. Physical layer checks should be performed before deeper software fixes such as driver reinstalls or a factory reset, which are more time-consuming and unlikely to resolve a simple connectivity issue.
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What is the role of an HDMI cable in transmitting audio and video?
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How can you verify if audio output is set to the correct device?
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Why should physical layer checks be performed before attempting software fixes?