Hi guys, just received my Pineapple today and this topic is the closest one matching my problems.
Full disclosure: I was setting up my Pineapple for the first time when I noticed that my university's WiFi connection was dropping sporadically. The setup claimed to have finished, and I was able to hit "Continue" to move on. However, login attempts did not work; I was told my password was incorrect. I typed in my password very carefully (and obviously twice) but.. well, no luck! I theorize that something may have happened during setup finalizing and the WiFi going up and down. At this point I did not have time to try again, so I packed everything up and went to class.
Fast forward to now. I attempted the accepted answer in this thread, but I still cannot connect to http://172.16.42.1:1471 My Pineapple is giving me the red, blue and amber blinking pattern indicating that firmware flash was successful, and yet no connection. Is there a step I am missing? I am aware that this is technically not the "first boot", but after a factory reset does one follow the first boot instructions included with the Pineapple?