220-1101 Question 12
Single answerMicrophoneA user reports that their headset microphone stopped working during video meetings on a Windows laptop. They can hear audio through the headset speakers, and the headset works on another computer. On the affected laptop, the built-in microphone still records normally. You verify that the headset is connected to the laptop's single 3.5 mm audio combo jack. Which action is the MOST likely to restore microphone functionality?
- A
Replace the headset because the microphone element has failed
- B
Install or use a TRRS-compatible headset adapter designed for a combo audio jack
- C
Disable the laptop's built-in microphone in Device Manager
- D
Increase the speaker playback volume to improve microphone detection
Show answer and explanation
Correct answer: B
Explanation
The key clues are that the headset microphone works on another computer, the built-in microphone works on the laptop, and audio output through the headset is functional. That points away from a failed headset and toward a connector or compatibility issue. A+ Core 1 troubleshooting emphasizes verifying known-good components and isolating the fault domain. With 3.5 mm headsets, a common issue is mismatch between stereo headphone plugs, separate mic/headphone plugs, and laptop combo jacks that require a TRRS connector with the proper standard. Best practice is to confirm the physical connector type, ensure the headset is fully seated, and use the correct combo-jack adapter if needed. This aligns with standard vendor guidance from laptop and headset manufacturers, which commonly notes that combo audio jacks require compatible TRRS headsets or adapters for microphone support.
- A. Incorrect.
This is incorrect because the headset has already been tested successfully on another computer, which strongly suggests the microphone hardware is functional. Replacing the headset would ignore the evidence gathered during troubleshooting.
- B. Correct.
This is correct because many laptops use a single 3.5 mm combo audio jack that expects a TRRS connector with the correct pinout. If the headset connection or adapter is not compatible with the laptop's combo jack, headphone audio may work while the microphone does not. Using the proper TRRS-compatible adapter or headset connection is a common fix in this real-world scenario.
- C. Incorrect.
This is incorrect because the built-in microphone working normally does not prevent a properly connected external headset microphone from functioning. Disabling the internal microphone might change the default input behavior in some cases, but it does not address the more likely physical connector compatibility issue.
- D. Incorrect.
This is incorrect because speaker playback volume affects output audio, not whether the system can electrically detect or use the headset microphone. This reflects a common misconception between audio output settings and microphone input functionality.