Abbreviated as BSoD (not to be confused with the same abbreviation of Windows' Blue Screen of Death), it is the Original Xbox's equivalent to the PlayStation 2's infamous Red Screen of Death (RSoD). It shows a black background with the green "Your Xbox requires service" text and a error code at the upper left side.
Someone who played the OG Xbox: I remember the Black Screen of Death, that it was so traumatic!
Microsoft ruined Windows 11 and that's one of the main reasons how. It's still BSOD, though.
Person 1: yo I got black screen of death what can I do?
Person 2: you upgraded to windows 11?
Person 1: yep why?
Person 2: nothing special, you can fix it by... and some tech stuff
Person 1: thx cya round!