This message was posted on behalf of Intel Corporation
R0nd: Thank you very much for joining the Intel® NUC communities. We will do our best in order to provide the information you are looking for.
In regard to your question, from our side on the NUC there is no option to issue HDMI-CEC commands programmatically, the HDMI-CEC basically is a feature on the NUC that you can enable or disable. On the other hand you can always check with the manufacturer of the TV to confirm if that is possible on their unit.
In order to try to fix this problem we can always try a BIOS update to version 0041 using the F7 method:
Any further questions, please let me know.