Hy guys, I'm having a situation here: I shut down my PC without problems, but now it does not boot anymore. When I firstly tried to start it up it simply did not show anything on the screen. I reset it and it started beeping: 3 long beeps rounds. I cleaned the RAM and placed it back. Now it does not beep anymore but it neither shows anything on the screen. However, it automatically resets after about 1 minute. I also noticed that the CPU fan starts, it stops for a few seconds and after that sometimes it remains stopped or sometimes it starts back. I checked the RAM with another PC and it's working. Could it be the video card (it's cooler is working) ? Or the battery ? What should I do next ? Thanks.