I have this laptop, and whenever I press the power button it lights up. Then when the windows loading screen would pop up, it is just a pure black screen (no line for the bios boot up). And then it freezes there. I managed to turn it on today, and I ran a virus scan and removed the viruses I found. Then the computer restarted, and it doesn't boot up again. When I press the button there is no beep (but I am not sure if this applies to laptops as well). When we turned it off when it was functional there was a high pitched power down sound, but now there isn't even that. what could be the problem? Another note is that it was a progressive thing. It didn't just not boot up from one day to another.