Revert your Cisco AP using a TFTP server and a new IOS File:
1- The PC on which your TFTP server software runs must be configured with a static IP address in the range of 10.0.0.2 to 10.0.0.30. The subnet mask will be 255.0.0.0.
2- Make sure that the PC contains the access point image file in the TFTP server folder and that the TFTP server is activated. An example IOS file would be c1130-k9w7-tar.124-10b.JDA3.tar for an 1100 series access point.
3- Rename the access point image file in the TFTP server folder to the default image name. It will be c1200-k9w7-tar.default for a 1200 series AP or c1130-k9w7-tar.default for an 1130 series AP.
4- Connect the PC to the access point using an Ethernet cable.
5- Disconnect power from the access point.
6- Press and hold the MODE button while you reconnect power to the access point.
7- Hold the MODE button until the status LED turns red (approximately 20 to 30 seconds), and release the MODE button. For the 1130 APs, hold the button until the console indicates that the button is pressed (the R LED will be solid red): Console will read something like this: button is pressed, wait for button to be released...
Once it starts uploading, the E & R LEDs will both be blinking (1130 AP). Once you release the button, you should see the console extracting files from the tarball on the TFTP server.
**NOTE** - I have had some TFTP server software fail to start the download. If you run into this issue try a different TFTP server software.
Links to my favorite free TFTP software:
8- Wait until the access point reboots. The best way to see when it has rebooted is to watch the console.
9- After the access point reboots, reconfigure the access point using the GUI or the CLI
CLI REFERENCE (You will need a Cisco Login to Access the following link)