Just recently, my laptop suddenly became mute. This occurred while I was watching a video. My laptop put itself to hibernation or something, because it was running out of battery life. After I recontinued my session, I had no sound at all. I've tried several attempts to fix this, but to no avail. When I plug in my earphones and try to hear from them, they work perfectly fine, but when I unplug them, everything becomes mute. If anyone can, please help. I have a Toshiba Satellite A505-S6005 with Windows 7 64-bit. P.S. Attached to this post is a summary generated by CPUID PC-Wizard.