So yesterday I built a PC, turned it on, it showed me bios, it showed me black screen with ''Choose your boot device'', yadi yadi yada,everything was fine. Today I planned to install windows from USB. I turned on my PC, fans were spinning, seemed like everything is working. But my screen is just blank! I have HDMI connection to motherboard and Samsung monitor, right now writing this I am using my old PC and everything is working with the same HDMI cable and monitor. What kinda sorcery is this? (My blank monitor in corner changed HDMI to analog and back to HDMi and then to analog again, if that helps. That means it received at least something.)