Hello! I've had this laptop for about a year now. I received it from a friend of mine and it worked well for a while. Until recently it had been overheating and shutting down alot more often. So I took it apart to clean the fans (which was overwhelmed by dust) and now it seems the problem has gotten worse. Not only that, the fan now makes a really loud noise. It's a model PCG - 3J1L Personal Computer. Any help is appreciated!