Hi my name isXXXXX have been an appliance servicer since 1992.Your model number is XXXXX a few numbers. If you can get the model number off the inside of the refrigerator compartment with the serial number i can look up the correct information. But the issue you are having is that your display is showing locked? like a child lock ?
model# XXXXX ser.#107kr00014
Thank you for the model number, is it stuck on child lock>?
That unit is actually built by LG manufacturing. If it is stuck on lock, you would need to change the control board part# ACQ76217921. This should solve your issue completely.