You need to add nomodeset to the kernel command line, as your monitor seems connected to the Nvida card. Without Nvidia driver the nomodeset parameter is required to overcome the initial black screen (not all cards are compatible with nouveau thus the black screen).
When you are at grub boot loader screen, simply hit “e”
Navigate with the arrow keys to the line which starts with “linux”
Hit “end” at your keyboard
Put a blank and nomodeset at the end of this line
Hit “F10”