New problem, can no longer get a screen after the rainbow, I did some editing on the config file as what I searched "hdmi_drive=1
hdmi_force_hotplug=1" I get some text now as loading then no signal message from monitor
Explain what you mean by firmware update and how you did that and why?... Simple edits to a config file is not a firmware update.
Good idea using a video from FIVE YEARS ago, that's going to still work, not.