My pc was working perfectly fine but my case was a little small and had bad airflow. So I decided to swap my old case with a new bigger one. After fully reassembling my pc, I flipped the switch and the fans started running, the usb ports have power, the cpu fan is running, the gpu fan is running, but the monitor only says going to sleep. I have tried multiple monitors, a different gpu, reseating the ram. All of the wires are plugged in. I have even tried removing the mobo out of the case and the problem persists. Any help or suggestions would be amazing.