I bought a new monitor and after connecting it to the graphics card and starting the computer I have a black screen for a moment, then the classic "welcome" is displayed and the computer works properly. Trying to fix it, I decided to connect 2 monitors on the old monitor connected via DVI-D, the BIOS was displayed, and on the new screen connected via HDMI at that time, a black screen, then on both monitors windows fired. I would add that before the old monitor was also connected via HDMI, but everything worked correctly. I have no idea what to do graphics card is RADEON RX 470 g1 gaming 4gb.