Tim there is no reset button on the 104, thats the rap3 or RAP155 as far i know!
You will need to consle the AP and do this on the apboot
To enter on the apboot
Have the AP 104, connect the console cable to the AP and then power it up
And then press enter until you see the apboot
on the ap boot issue this command
clear os
purge env
save env
reset
And there you go you will have your ap back to IAP mode!
Cheers
Carlos