If
the projector's control panel buttons have been locked, hold the
Enter or 
lock button on the projector's
control panel for seven seconds to unlock them. You can also use
the remote control to set the Control
Panel Lock setting to Off
in the Settings menu.
lock button on the projector's
control panel for seven seconds to unlock them. You can also use
the remote control to set the Control
Panel Lock setting to Off
in the Settings menu.
If the remote control buttons have been locked, hold the i button on the remote control for 5 seconds to unlock them.