If you cannot control an HDMI device using the HDMI
Link feature, try the following solutions:
Make sure
all necessary cables are securely connected and the power is on for
the projector and connected audio and video
sources.
Make sure the cables meet the HDMI CEC
standard.
Make sure the connected device meets the HDMI CEC
standard. See the documentation supplied with the device for more
information.
Note: Some
connected devices or functions of those devices may not operate
properly even though they meet the HDMI CEC standard.
Replace the HDMI cable or try a shorter one.
Make sure the HDMI
CEC setting is enabled.
Make sure the connected devices are turned on and in
standby status. See the documentation supplied with the device for
more information.
If you connected a new device or changed any
connections, make sure the CEC function is set for the connected
device. You may need to restart the device.