EasyLink requires devices to be connected to the TV by HDMI
These devices should have the HDMI-CEC functionality
Switch on EasyLink on the TV, press the ‘MENU' button on the remote control and select Installation > Preferences > EasyLink, select On
Also switch on HDMI-CEC on the connected device
The HDMI-CEC functionality on devices from other brands might not work with your TV due to different interpretations of the HDMI-CEC industry standard