If the user presses the button on the projector panel, it will not take effect, and the screen prompts "This operation has been locked, please unlock the operation".

Two. cause analysis

The user turns on the "operation lock" function of the projector, and then presses the control panel button, and the above prompt will appear on the screen.

This function can prevent someone from changing the projector settings without permission at school, other occasions or when holding activities.

Three. solution

Method 1. Use the remote control to select "Close" from "Settings"-"Operation Lock" in the menu.