I shutdown my laptop successfully last night, and today when I started, it display a message about the heat and asked me whether I want to continue. I immediately turned if off and opend it up to see if perhaps dust had acumiliated in the fan area. I didn't see major dust but I cleaned it a little anyway. After putting everything back together, when I start it, the system's light goes on, the fan starts but stops after about 10-15 seconds and there is nothing on the screen either. I checked out all connections to see if I missed something while putting things back - and I didn't see anything.