I own a Dell Inspiron 15 windows and somehow the built-in laptop speakers won't play any sound at all, including when Windows start up.

Anyway, I tried going to Device Manager to uninstall my sound thing called "Realtek high defination Audio " but it still wouldn't work. Then I tried updating the driver, still does not work. The audio does work when I plug in headphones.Can someone please direct me to how I can fix this problem? Thanks.