My son's new gaming PC (that he also uses daily for school work) was working great and today while he was in class, it just shut off and will not turn back on. Its a custom build that has been up and running beautifully for three months. When we try to turn it on now, the RGB lights and the fans in the case turn on for a split second and then nothing. It's like it starts the process of turning on but something is missing so it turns right back off? We tried removing the CPU and GPU and reinstalling with no change. The monitor registers being connected to a graphics card. Any suggestions of what to do from here? We are both pretty new to this! Thanks!!!