The following method will enable a Cisco Aironet Autonomous Access Points to be converted into Lightwright mode by flashing the code. I have tested this on c1252 model but the same method should work as long as the models are supported by Cisco.
Download the recovery image and place it in the TFTP Server.
Remove the trailing
.tar from the image filename, it should look something like the following.
Set the Laptop IP Address as follows…
IP Address: 10.0.0.5
Subnet Mask: 255.255.248.0
Default Gateway: 10.0.0.10