RetroPie
If you’re a Raspberry Pi user, we’re currently recommending RetroPie as the OS of choice to run on your Picade.
After installing RetroPie on an SD card, and before booting it up, make sure you edit your /boot/config.txt and add or uncomment ( remove the # before ) hdmi_force_hotplug=1.
Since the display is powered from the Pi it wont be properly detected at startup, so this is required to make it work.
where can i find this setting on my retropie OS?