My computer won't start. How do I fix it? 
 First check that the computer is plugged in. If there's a switch on the power supply make sure the switch is in the on position. Check to see if the fans turn on when you hit the power button. If so, then the computer is likely getting power. Do you hear a beeping sound? That means the computer is successfully able to load the BIOS and you issue might be related to the installation of the OS. If you can't get to the BIOS, you may have a hardware issue with computer. Open the case and check for loose connections. Try reseating the ram. If that doesn't work you may have a short on the motherboard, which might need replacement.