Thank you for posting in Microsoft Community.
We understand that you're having issue with your Surface Headphone 2
This looks like a hardware issue that cannot be manually fixed, so please proceed with the warranty process directly:1. Visit the following page, log in to your Microsoft account, and select Device service and repair.https://account.microsoft.com/devices/select-device-for-repair2. If your device is already registered, select it and follow the instructions. If your device isn't listed, select Register device, then follow the instructions to get service.
Of course, if you have any questions about the process, feel free to contact our online support before proceeding with the quality assurance.
See steps below in reaching them:
- Go to Contact Us - Microsoft Support2. Choose how you would like to get support for your Surface device.3. Type in the problem you need help with.
- Look at any available solutions offered and select Contact Support.
I wish you all the best and hoping you'll get a resolution there.
Lugoo Bei | Microsoft Community Support Specialist