Hi guys, I have a Dell Inspiron 9400, service pack 3. Up until Monday, my sound was working fine. Now I simply can't get any sound out of my laptop whatsoever! I am wondering whether someone has somehow changed settings or volumes I don't know about so if anyone can suggest anywhere to look I'd appreciate it. I know my soundcard AND speakers are fine. I checked my Device Manager and the device is fine. I also ran a diagnostics check at startup.. as in the F12 key and checked the sound.. I heard a few melodies, clicked the 'yes' I can hear button and the test was complete.. So why, when I turn on my laptop and play a song/video/etc.. can I not hear a single sound? Obviously, my laptops general settings are not muted.. I have checked. Any help would be appreciated!