You could start by trying to boot with an extra boot parameter. When you have the menu in front of you where you see "Graphical Install" press tab. Than at the end of the line type nomodeset and then press enter again, then the system should boot into the installer. If that doesn't help it would be useful to know what graphics card you have in your system.
Another option would be to try the "Installer" option and then use the TUI installer, after finishing installing you could then update and reboot your system to see if you still have the same problem. If so you would then be able to install the correct video drivers from the repositories.