So I decided to buy a new desktop (first in 12 years). Among other parts it has a msi B350 PC Mate mainboard and a Ryzen 7 2700X CPU (naming these 2 because they might be the issue). So today my BIOS got updated so that it works with Ryzen 7. Now I tried to install Kubuntu 18.04 from USB and later DVD, which was not working (I guess thats a secondary issue atm). When I was checking the BIOS settings, after a two or three minutes (less time if I restarted immediately after) the Debug LED for CPU on the mainboard went on and I got a black screen. Does anybody know what the issue might be? The tech that made the BIOS update apparently had no problem (dont know how long he had it running though; used my CPU and RAM to test after update).