Re: Anker Soundcore Liberty Air earphones don't work on my DELL Vostro 2521
I don't have your laptop, but one thing you might try (if you have access to a BT speaker or headset) is another bluetooth device. It is possible you will have the same trouble with another BT device as well. I'd consider re-installing / updating the driver, perhaps also the audio driver.
Did you go to the support site and check if your drivers are up to date?