1️⃣Try to test the mic with a laptop or a smartphone.

2️⃣Use another USB cable with a data transmission function to test the mic.

1️⃣Check if the mic mute button syncs with the physical mute button on the keyboard, such as a laptop/PC keyboard, or an external Bluetooth keyboard.

2️⃣Please keep the mic away from wireless gear, like a wireless mouse or keyboard, by using a boom arm, and test again.

3️⃣Unplug all other USB peripherals like keyboard, mouse, and other mics to test. Only plug the mic into your computer, and test it with each USB port. Do not use a USB hub or extension cable for the connection of the mic.

1️⃣Check if the mic is muted on your computer; the speaker icon appears red when it is muted.

2️⃣Go to sound settings- "Sound Control Panel" - "Recording Devices" - set "Fifine microphone" as the default input device - "Properties" - "Levels" - make sure the speaker icon is not in red.

3️⃣Make sure the computer is in work but not hibernation status (like black screen hibernation).

1️⃣If there is a grounding problem, try to use a 3-prong to 2-prong adapter on one of your power outlets to break the ground loop.