The assembly went well, except for the Geforce RTX 1070 and everything new. BIOS update to 1805 also worked. The PC also started and reported no errors. But... The monitor stays black most of the time, no signal. I tried a second monitor with a different cable, same thing. This wouldn't be so bad if I could install Windows with all its components. But it's not: Windows reports that there is no network during the installation. The LEDs light up on the RJ45, a laptop on the same cable has network. I also plugged in a PCI-E network card, but it is not recognised during the installation. This is my first AMD board and my worst PC assembly experience ever. Does anyone have an idea how I can get a network? CPU: Ryzen 5 5600 X