Sony VPL ES7 Operating Instructions Manual page 46

Caution Messages
Use the list below to check the meaning of the messages displayed on the screen.
Message
Not applicable!
The panel keys are locked! "Panel Key Lock" on the SET SETTING menu is set to "On."
46
Troubleshooting
Meaning and Remedy
You have pressed the wrong key.
c Press the appropriate key.
c All the keys on the control panel of the projector are locked.
Operate the projector with the keys on the Remote Commander
(see page 34).