It shows an x next to the sound icon on the bottom right taskbar, when i click on it, it runs a diagnostic which can't detect the problem. When i open up device manager, I can't even find a sound driver. The F1, F2 and F3 (volume control) keys aren't working either. I tried installing the audio driver but that didn't change anything, it still didn't show up in device manager. I'd be greatful if you guys could provide me with a solution for this issue, it's a fairly new Lenovo 330 15ICH laptop.