I have a Sony vaio laptop. Today I wanted to clean the insides of it so I opened it up and cleaned it. After I put it back and powered it on, it would power up but go off by itself in about a minute. The screen is also blank and I tried connecting an external screen (through hdmi, not VGA cable) but it does not work. Also, when I press caps lock or num lock on the keyboard, it does not detect it. And the hard disk does not spin up when it starts. I'm freaking out, can someone help me?