Hi, I have a problem with my Dell Inspiron 1525. It's just 1.5 years old, but six months ago, I couldn't even turn it on (long story), but my tech geek brother took it apart, fixed it, reformatted, and it was working fine until a few days ago. It's making this rattling sound that gets pretty loud. It's not constant, but once it starts, it's like it will never end. It sounds like the mild rattling that you hear during tiny earthquakes (I'm in Southern California; it's a common occurrence). It's not the CD-Rom drive; it sounds like it's coming from the back/bottom of the laptop. Anyway, does anyone have any ideas as to what might cause this? It's not only driving me crazy, but making me worried that the thing will fry or something (obviously, I have no technical knowledge).