according to http://www.etour.co.jp/Solar/index.html, there are four flights from stl to sfo. three of them, flight #s 1993, 461 and 1055 are (ex-twa) md-83s and flight 1085 is an md-80.

assuming the original poster meant flight 1993, (or aa made a minor flight number change), then he was on a twa plane.

i didn't think twa planes had any laptop power at all, so the bit about it being there and disconnected is surprising.