Hello. Thank you for your help. Problem was in the BIOS option. If you want to boot without a monitor, you must enable Legacy Option ROMs. I don't know why, but it solved problem.
Hello, I have Windows Server 2016 on PowerEdge T20. Server does not boot with disconnected monitor. If monitor is connected (turned on and even off), booting is OK. Any tip where is a problem? Thank you
PowerEdge T20 no boot without monitor