From the looks of it the reinstalling is not working.
Try taking some hardware out one-by-one and boot it.
If it stops when you have a bit of hardware out then the hardware is faulty.
What Operating system are you running? If you are running it for Vista I would recommend checking your BIOS version since you may need to update that. I don't see how reinstalling your OS and going through the time to do that would solve the issue if it doesn't work after going back to the factory settings...
Sometimes, it's a heating problem. Especially since laptops are worse than desktop machines for that. But if nothing is overheating, then I would guess it's just your BIOS that needs to get updated.
Someone bumped this, it's old and the guy hasn't been on since the day he posted this back in December!