I have an Averatec laptop with Windows XP (Home) and it usually runs fine. But recently whenever I turn it on, Windows doesn't load. It stays at a black screen. It's kinda like it just stops thinking. And whenever I push the button to turn it off, it makes like a "dink" sound. Kinda like when you click off a table lamp. I've never heard it do that before. Does anybody know what might be wrong?