LG MC9280XC - Manual (Page 12)

Child
Lock
Press STOP/CLEAR.
Your oven has a safety feature that
prevents accidental running of the oven.
Once the child lock is set, you will be
unable to use any functions and no
cooking can take place.
However your child can still open the
oven door.
12
Press and hold STOP/CLEAR until “CHILD LOCKED” appears on the
display and BEEP sounds.
The CHILD LOCK is now set.
To cancel CHILD LOCK press and hold STOP/CLEAR until “CHILD
LOCKED
” disappears.
You will hear BEEP when it’s released.