Is direct sunlight or strong light from fluorescent lamps shining
onto the Remote Receiver?
Are the batteries dead or have the batteries been inserted correctly? Make sure the batteries are inserted correctly or replace the batteries with new ones if necessary.s
I want to change the language for messages and menus
Check
Change the Language setting.
The operating range for the remote control is about 6 m.s Quick Start Guide
Set the projector up in a location where strong light does not shine onto the Remote Receiver.
Adjust the "Language" setting from the Configuration Menu.s