Hi, I tried to start my computer and when I start it I can hear the fan go on but nothing shows on the screen and there is a yellow light in front of the computer instead of green one (it is not flashing). I tried to clear CMOS by removing the battery and reinstalling it and it didn't work. I took of the RAM and replaced it didn't work either. Also I can't stop the computer by olding the start button, I need to close it from the power supply switch. I tried to remove my graphic card and plug it in the motherboard card without any succes. I really don't know what to do next.