Install the LibCEC Drivers
Download the drivers for Windows from here. When you install the Drivers on your machine, you may get the following message, informing you that the EventGhost Plugin was not found. Don’t be alarmed by this message, you can ignore it by pressing OK:
When you get to the section of the installation that installs the different elements of the Driver, be sure to select the CEC Debug Client option, which is NOT selected by default. Without this option, Display Control will not work. Once that is checked, press Next:
Once the installation has completed, reboot the Display.
With the HDMI-CEC enabled monitor connected to the Media Player, open a command prompt window, by searching for Command Prompt in the Search bar.
With the Command Prompt open, type in cec-client -l (lower case L) and press Enter.:
This will search for a connected HDMI CEC compliant device, and if found, will display that it has found a connected device:
Once your Device has been discovered, type in cec-client at the Command Prompt, and press Enter. This will search for and return all details about that connected device. Once that has completed, you’ll see the number that has been assigned to the HDMI CEC compliant device. In this case, it is Device 0 (Zero):
Next, type the word scan, and press Enter:
After the scan, the appropriate information about your device will be displayed. Specifically, it’s current status:
Now you can type the 2 different commands that are used to turn the Display on and off. In your Command Prompt, type:
standby 0 (turns the monitor off):
on 0 (turns the monitor on):
If you can confirm that those 2 commands turn the monitor on and off, you know it is working!