By the way, I tried this from another post but when I got the menu, I never saw "Advanced options for Ubuntu" as an option on the menu
An alternative work around on the MINIX Neo Z83-4U device is to interrupt the GRUB boot process by pressing ESC when it comes up with the purple screen. From the menu that appears select the "Advanced options for Ubuntu" and then the "recovery" option of the kernel you want to boot e.g. Ubuntu, with Linux 4.15.0-60-generic (recovery mode). After a few moments, it will display a Recovery Menu with a number of options. Select the first option "resume" for "Resume normal boot" followed by "OK". Your device will then complete booting and HDMI will now work.