I remember there was an Easter egg but I can’t recall if it was related to no disc and then loading an audio cd or something else. You’d have a small space ship flying around and towards and away from the screen almost like a screensaver.
It’s been almost 30 years though so I’m a little hazy on the details.
It’s bugging me that I can’t find it online anywhere.
Little of both. This is where you might encounter a boot error, between the white and black screens. But I never saw one that I didn't forcibly make happen when modding. At least not with PlayStation's. Xbox red rings were common as fuck, and they would also occur during the startup logo sequence.