We have a HP Pavilion DV3 4000SB that was given an error on startup that the fan was having problems (System Fan 90b error message) So I decided to open the laptop up and clean the fan, as that seemed the easiest option. Upon opening it up, at first I froze and thought "No wonder! The whole thing's burnt!", but then I started thinking it looked more like someone used a spraycan on it. I looked up a video on youtube of someone disassembling his Pavilion and noticed there wasn't any of the black on his, so my question here is: Have any of you encountered this, or know what it is? Or if it's something that could point to a problem?