Why does the display have "locked" in it?

Why does the display have "locked" in it?

how do I fix my microwave when it wont do anything but says locked on the display

ANSWERS:

"Sounds like you have the child lock on. Touch and hold until LOCKED disappears in the display. (approximately 4 seconds)

See page 12 in the operators manual.

http://kitchen.manualsonline.com/mdownlo..."

unplug to reset but everything will be reset