Hi Pittyh what kind of diagnostics software are you running here?
Are you testing TMDS signals on an FRL cable?
Sorry for the late reply, it’s just the LG TV hdmi stats page
LG C9
Go to settings(cog on remote) > all settings > programmes > hover over programme tuning press 11111 on remote.
then press right and select HDMI MODE
Also have a question ..bought three cac-1372 from Amazon.ca because they are suppose to be HDMI certified…received today and no HDMI certification label on any box or cable?