You may have good success booting into run-level 1 or 3
Do that at the boot menu by highlighting the Fedora menu selection and typing e and press enter
Then, go the the line which has a bunch of kernel stuff on it like this or similar ...
kernel /boot/vmlinuz ro root=/dev/sda1
Then, type e again and press enter
Then, space over one and type 1 then, press enter . It would look like this ...
kernel /boot/vmlinuz ro root=/dev/sda1 1
Then, type b to boot up into run-level 1
#Note: that gets you logged in as root user
Now, run the display configuration tool with the command:
That should allow you to select the correct monitor settings.
After you are done, type: reboot