HPE ML150 G9 Stops at boot

I just bought a used ML150 G9 for learning more about servers. It booted fine with WS 2012.  I tried to install WS 2016 from a USB stick but something went wrong. It ajust stops at this point and doesnt continue. Nothing happens when I push F9, F11 or F12. I have tried with and without both USB-stick and disks. No error messages, nothing. 

https://imgur.com/a/NboJ3hJ

Any ideas what I can do?