How to Fix a PC Microphone That Is Not Working

Published 2026-10-16 · LuxuriousComputers Repair

Your microphone does not pick up any sound on your PC. You speak into it and the other person on the call hears nothing, or the recording application shows no audio input. Or the microphone picks up sound but it is extremely quiet, distorted, or cuts in and out. Microphone failures on a PC are most commonly caused by incorrect input device selection, privacy settings blocking access, driver problems, or a physical connection issue rather than a dead microphone.

Check which microphone is selected as the input device

• Windows can have multiple audio input devices and may be listening to the wrong one. Right-click the speaker icon in the system tray and select Sound Settings. Under Input, check which device is selected as the active microphone
• If you have a USB headset, a built-in laptop microphone, and a webcam microphone all connected, Windows may default to whichever was most recently plugged in or to a device you do not intend to use. Select the correct microphone from the dropdown
• Click on the selected input device to open its properties. Speak into the microphone and watch the input volume meter. If the meter does not move at all, the wrong device is selected or the microphone is not working. If the meter moves slightly, the volume may be too low
• Set the input volume slider to at least 80 percent. Some microphones need the volume set to maximum to produce adequate sound levels. If there is a Boost option, increase it by 10 to 20 dB if the microphone is still too quiet

Check microphone privacy settings

• Windows has a privacy setting that controls which applications can access the microphone. If this is turned off, no application can use the microphone even though the hardware works. Open Settings, Privacy and Security, Microphone
• Ensure Microphone Access is turned on at the top. Below that, ensure Let Apps Access Your Microphone is also turned on. Then check the individual app list and make sure the specific application you are trying to use (Teams, Zoom, Discord, or your recording software) has microphone access enabled
• Desktop applications (non-Store apps) have a separate toggle: Let Desktop Apps Access Your Microphone. This must be on for programs like Chrome, Firefox, Steam, OBS, Audacity, and most traditional software
• If you recently installed a Windows update, privacy settings can sometimes reset to their defaults, which may disable microphone access. Check these settings after every major update

Test the microphone in Windows

• Open Settings, System, Sound, and scroll down to the Input section. Click on your microphone and then click the Test Your Microphone button (or Start Test on Windows 11). Speak normally and Windows displays the detected volume level as a percentage
• If the test shows zero percent, the microphone is either not connected, not selected, blocked by privacy settings, or the driver is not working. If the test shows a low percentage (under 20), increase the input volume and boost
• You can also test using the Voice Recorder app (Sound Recorder on Windows 11). Open it from the Start menu, record a short clip, and play it back. If you hear your voice, the microphone hardware and driver are working and the problem is application-specific

Fix physical connection issues

• For USB microphones, unplug the USB cable and plug it into a different USB port. Avoid USB hubs — connect directly to the computer. If the microphone has a power indicator light, verify it turns on when plugged in
• For 3.5mm analog microphones, ensure the plug is in the correct jack. PCs typically have separate jacks for microphone input (usually pink) and headphone output (usually green). Plugging the microphone into the headphone jack produces no input
• Many headsets use a single combined 3.5mm TRRS plug that carries both audio output and microphone input on one connector. If your PC has separate microphone and headphone jacks, you need a TRRS splitter adapter to separate the signals into two plugs
• Check the microphone cable for damage. Frayed cables, bent plugs, and loose connections cause intermittent audio or complete failure. Try the microphone on a different device (another computer or a phone with a headphone jack) to determine if the microphone itself is the problem

Update or reinstall the audio driver

• Open Device Manager and expand Audio Inputs and Outputs. Find your microphone in the list, right-click it, and select Update Driver. Choose Search Automatically. If Windows finds an update, install it and restart
• If updating does not help, uninstall the driver. Right-click the microphone in Device Manager, select Uninstall Device, and check the box to remove the driver software if it appears. Restart the computer. Windows detects the microphone and installs a fresh driver during startup
• Also check under Sound, Video and Game Controllers for your audio chipset driver (Realtek, Intel Smart Sound, or similar). Updating the chipset audio driver can fix microphone detection and volume problems because the chipset driver controls the audio hardware that processes microphone input
• For USB microphones, also check under Universal Serial Bus Controllers for the USB controller driver. A malfunctioning USB driver can prevent the microphone from being detected at all

Run the Windows audio troubleshooter

• Open Settings, System, Troubleshoot, Other Troubleshooters. Find Recording Audio and click Run. The troubleshooter checks for common microphone configuration problems and attempts to fix them automatically
• The troubleshooter can detect and fix issues like the wrong default device, disabled microphone services, and incorrect audio format settings. Follow any recommendations it provides and test the microphone after each fix

Check application-specific settings

• Many communication and recording applications have their own microphone selection independent of the Windows default. In Zoom, go to Settings, Audio, and select the correct microphone. In Discord, go to User Settings, Voice and Video, and check the Input Device dropdown. In Teams, click the three dots during a call and go to Device Settings
• Some applications have a microphone test or voice test feature. Use it to verify the application can hear you through the selected device. If the app test works but calls do not, the problem may be network-related rather than microphone-related
• Check if the application has its own noise suppression or automatic gain control that might be suppressing your voice. Aggressive noise cancellation can sometimes filter out quiet speech along with background noise

Check the audio format and sample rate

• An incompatible audio format can cause the microphone to be detected but produce no sound or garbled audio. Right-click the speaker icon, select Sound Settings, then click on your microphone under Input. Under Format, try changing the sample rate
• Common working formats are 16-bit 44100 Hz and 16-bit 48000 Hz. If the microphone is set to an unusual format like 24-bit 96000 Hz, some applications may not handle it correctly. Try a standard format and test again
• In the older Sound control panel (accessible by searching for Sound in Control Panel), go to the Recording tab, select your microphone, click Properties, then the Advanced tab. You can set the default format and test with the Test button

Restart the Windows Audio service

• The Windows Audio service manages all audio input and output. If this service crashes or hangs, the microphone stops working even though the hardware is fine. Open Services (search for Services in the Start menu), find Windows Audio, right-click it, and select Restart
• Also restart the Windows Audio Endpoint Builder service, which manages audio endpoints including microphone inputs. Both services should be set to Automatic startup type
• After restarting both services, test the microphone. If the services were in a stuck state, the microphone should start working immediately

Fix microphones that are too quiet

• If the microphone is detected and picks up sound but the volume is extremely low, increase the input volume to 100 percent in Sound Settings. Then open the older Sound control panel, go to the Recording tab, select the microphone, click Properties, go to the Levels tab, and increase the Microphone Boost slider
• Microphone Boost adds amplification in increments of 10 dB. Start with plus 10 dB and increase if needed. Adding too much boost introduces background noise and hiss, so use the minimum boost that makes your voice clearly audible
• Condenser microphones (studio-style USB microphones) need to be positioned close to your mouth, typically 6 to 12 inches away. Speaking from several feet away produces very low volume on these microphones regardless of software settings

Hardware failure signs

• If the microphone does not work on any device (test it on another computer or phone), the microphone hardware has failed. USB microphones can fail internally even though the USB connection is detected. Analog microphones can have internal wire breaks that are not visible externally
• On laptops, the built-in microphone connects to the motherboard via a thin cable inside the display hinge. If the microphone stopped working after the laptop was dropped or the hinge was damaged, the internal cable may be disconnected or broken
• Liquid damage to the microphone area (the small pinhole opening on the laptop) can corrode the microphone element. Even a small amount of moisture that reaches the microphone capsule can cause permanent failure

Need help with your microphone?

If your PC microphone is not working and the troubleshooting steps above have not resolved the issue, LuxuriousComputers Repair can diagnose microphone hardware problems, install the correct audio drivers, configure input settings, and restore full microphone functionality on your computer.