lolz.. I r in ur Laptop, Screwing wit yo Sound kard!
this is why Astro hates laptops... so prone to misbehaviour!
Have you installed anything new recently that woudl affect sound drivers?
Is windows still selected your proper soudn device as "playback" in its sound settings?
Is it not working all the time, ior just in certain instances?
Does headphone jack still work??
Whats your driver situation like? If you have no luck with other troubleshooting...Check manufacturers website for latest driver version.
Uninstalling + delete the existing ones from device manager, and install the newest ones