Hello cimo_sama,
Welcome to the HP Forums! I hope you enjoy your stay!
I understand the speakers make a buzzing sound often. Usually, this is a hardware error. In all honesty, I would contact HP phone support and they will likely service the product.
You can utilize this website to learn how to contact HP appropriately, based on your region: Contact HP Worldwide
Please let me know if you have any other questions or concerns. Thanks for choosing the HP Forums. Have a great day!
Mario