My lap top lost its sound - Dell Latitude E5400 Notebook

If your computer came with a motherboard disc the sound drivers could be on it

click start control panel administrative tools computer management device manager scroll to sound video and game controllers you might see a yellow question exclamation mark? ! or a red X Right click to

reinstall drivers

click start control panel sounds and audio volume advanced speakers make sure you have selected the

(appropriate speakers) also audio you will find 3 drop down lists make sure you have selected the correct speaker settings there

click start control panel sounds and audio devices select advanced there might be a tick in the mute box untick it
hope this helps