Should be a small microbutton in a paperclip diameter hole. Hold that microbutton it during power up of access point and then the access point will go back to factory default. * Hint many use paperclip, but warning.... make sure its the microbutton hole before inserting metal paperclip into hole. If its a single hole in the unit its likely the microbutton hole. Looking into the hole with a flashlight or good lighting should show a usually red, sometimes back plastic button face to press against
Other option is use a cross over cable direct PC to access point or a switch that is an unmanaged type that doesnt have an IP address and connect to the access point at the IP address you configured in error, switch it to different IP address and save changes, reboot of access point and then all set to go to bring it back to your network which has a managed switch that has an IP. ***Going the route of cross over cable direct connection or unmanaged switch as a means to not require a cross over cable will require use of static IP addresses.
The microbutton held in at boot of the access point is the best method if available to you.
