I have recently built my first PC, all lights and fans are on, but the monitor only displays: "No HDMI signal detected", but it does detect the computer The CPU (AMD 2600x) is in correctly. The RAM is in as well. I think the graphics card (Radeon RX 580) is in correctly, though there is a white LED on. All PSU (Corsair RM650i) cables are connected. The HDMI is plugged into the correct slot on the graphics card. My motherboard is ASUS Rog strix B450-f, if that is useful. Any help is welcome!