Main fan is dying.

[Masebot1]

My laptop fans when it goes fast instead of normal speed it goes berserk,sounds scratchy. and vibrates my whole laptop.
Wait could it be my Motherboards fan?

But I am wondering how much is it going to cost to replace it?

[Dumbfinger]

Replacing stuff on Laptops isn't easy...hence why I always go for the desktops. You might need to visit a local repair shop.

[CapsLoc]

Opening the laptop is the only tricky part, you can probably find a good tutorial online though if it's a rather new computer. The fans are usually easily accessible once you have the case opened up, it should just be a plug and play, a good fan that will have great airflow and good life will be around 10 - 15 bucks. Just open it up, get the size and go buy one at your local computer shop. Unless you are a complete noob, you can do it yourself and avoid a probable 60 dollar charge from a repair shop.