Original post by: fryarludwig ,
My guess is that it's not the keyboard or trackpad that is physically damaged, but rather the connections from those to your logic board. If you resoldered it and it worked for a minute then you're on a good lead. Try redoing the solder very carefully, and make sure it's impeccable. Then try that. If that doesn't work, look at other points along the connection cable, including where it meets both sides.