I would like to assist that after completion of formatting the PC did you installed the drivers of the devices which are being given along with your motherboard without that you can’t make use of any device with the help of the device driver so please find the drivers CD an install all the driver of the motherboard or you check after installing all the drivers you can go to your device manager and check all your devices if you see any yellow colored question mark or exclamation mark it means that the drivers are not installed and re-install all your drivers check whether you can see the speaker icon on the left hand side of the task bar.