My hp laptop comes on but the screen is off

[Inscribe]

My laptop screen went of when I was trying to use cool edit software. Since then, it never came

 

[smarthelp]

I'm sorry, but you're likely to change the fan speed which critically increased or decreased the CPU clock. You could even burn it. So I strongly recommend to bring your computer to a service center. It's hard to solve your problem without disassembling the computer.