Several things to check before trying the methods
Before you try the solutions below, please check these several things as it can easily make your microphone stop working by mistake. First, make sure your microphone is connected with your computer properly, if it’s a USB microphone, is it plugged into the right cable? Second, is your microphone muted? Last, do you turn on the microphone on your Hangouts call window? If you see your microphone icon is like this:
Method 1: Restart your computer
Sometimes, a simple restart can solve a lot computer woes. When you find your microphone stops working on Hangouts, you can also give the simple restart a shot. 1) Restart your computer from the Start menu. 2) Call the person on Hangouts again to see if he can hear you.Method 2: Update your microphone and other related driver
Your microphone not working issue can be probably caused by an old, corrupted or missing driver. Besides, if your microphone is connected with a USB cable, the USB controller driver also takes an effect on your microphone function. So you can update your microphone driver and other related, like USB controller driver, sound card driver, to try to solve the problem. To update your device driver, you can go to its manufacturer’s website to download the latest driver and install the new driver on your computer or, if you’re not confident with playing around with drivers manually, let Driver Easy help you do it automatically. Driver Easy will automatically recognize your system and find the correct drivers for it. The drivers supplied by Driver Easy are all from the official manufacturer’s website, so you can totally trust it. 1) Download and install Driver Easy. 2) Run Driver Easy and click the Scan Now button. Driver Easy will then scan your computer and detect any problem drivers.
Method 3: Close other programs those might use your microphone
If there are some other programs running on your computer when you’re on Google Hangouts, the other programs might be using your microphone, too. As a result, your microphone doesn’t function on Hangouts. So, please stop all the other programs that might use your microphone, then check to see if the person can hear you on Hangouts.