Type shutdowm /r /t 5 and hit Enter to reboot the PC in 5 seconds.Type reg add 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server' /v fDenyTSConnections /t REG_DWORD /d 0 /f.If you hear a beep you've got a Command Prompt window open Verify you are in a Command Prompt window by pressing Ctrl+ G and then hit Enter.
Press WINDOWS KEY+ R to get a Run prompt.Good luck typing all of it in correctly with no screen.