So, I've been using Premiere Pro CS3 for quite some time now. But for some reason, sometimes the audio output gets screwed up somehow (this continue on for days, no matter how many times I reboot the system). Currently when I create a new project and import audio (.wav), it plays, but there's no sound in both the import window and the timeline. It's the same if I open any of my older projects too.
Also, Everything else works fine when it comes to playing audio (i.e. WMP, iTunes, Chrome), so I doubt it's a hardware issue.