I have Compaq Presario CQ41. When I turn it on, the screen is black. When I switch it on, I can hear some noise from the fan and CDROM is functioning but still it is not responding. The power button lights up. I already tried holding the power button 1-2 mins with the battery is removed from the laptop. I also tried replacing the hard disc and RAM but it still doesn’t work. What could the the problem be? It happened after I downloaded games yesterday, but I shut it down properly and the next day that black screen happened.