there is a lite on control panel just below the air dry button that is lit it looks like a lock no other buttons will work
Here is the manual that comes up on the Frigidaire site for this unit.
http://manuals.frigidaire.com/prodinfo_pdf/Kinston/154580101_ben.pdf
See page 7 for how to unlock it.
If that does not work unplug/remove power from the unit for 5 minutes or so to see if it will reset.