Frigidaire Gallery GLEFM397DS Electric Kitchen Range "symbol change beep" Questions

...symbol lit up and the door locked itself and the touch control panel buttons stopped responding to my touch. Any suggestions for troubleshooting? I tried manually moving the "L-shaped" door lock ...

...symbol for approximately five seconds. A beep will sound and LOC will clear. The "DOOR LOCKED" will continue to flash until the oven door has completely unlocked. Your range should resume ...