I turn on my laptop, the fan starts the buttons come on. Then the fan goes off after about 4 seconds and the computer is frozen. I have removed the hard drive no change, the memory no change, the CD No change. Wireless card no change. Swaped out monitors no change. pressed the 4 arrow keys no change. Blew the machine out with air no change. After the power is on the lights across the top stay on and will not go out untill I unplug the machine. also no battery or battery it is still the same. Help