Re: Bit of a twist to the ending
Remove loose card -- leaving the slot orientation plug behind in the slot.
Reset loose card -- external device STILL DOES NOT WORK.
Remove card, examine slot orientation plug on the card. Confirm that slot orientation plug, now on the card, lines up with slot orientation gap in the slot.
Repeat repeatedly -- external device STILL DOES NOT WORK.
Eventually, get educated by someone who's had to have hardware replacement to fix exact same problem. Remove slot orientation plug from card, and re-apply it at the other end of the edge, and reseat the card 180 degrees around, the way it was before you started reseating the loose card ....