I am unable to use the remote control to navigate through presentation slideshows or as a wireless mouse. What should I do?

• Try the following:
  • Make sure the USB Type B setting in the projector's Extended menu is set to Link21L.
  • Make sure to use the projector's Computer or HDMI (PowerLite 1760W/1770W/1775W only) port to project your computer's display. You cannot operate the computer with the remote control, if you use the USB TypeB port to project your computer's display.
  • Make sure a USB cable is connected from your computer to the USB TypeB port on the projector.
  • Make sure your computer is selected as the source.
  Note:
  You may need to select specific settings on your computer for it to work with an external USB mouse. See your computer documentation for details.