How to downgrade/upgrade AIR-LAP1142N-N-K9 to autonomous mode

Question: Please guide me how to downgrade/upgrade AIR-LAP1142N-N-K9 access point to autonomous mode, because i don't have controller. i'm not able to login to access point as its in Leightweight mode.

Answer: Console into your AP and in enable mode, enter the command "dir flash:"

You'll see two IOS files, one with the "rcv" the other with "k9w7". Delete the directory that contains the "rcv" using the command "delete /f /r flash:<directory>" cisco1921-sec/k9 and reboot the AP.

Source: http://www.3anetwork.com/cisco-air-lap1142n-n-k9-price_p830.html