Calimero Oeuf - Yeah, i checked this parameters right on the beginning.
jimbo34 - I tried all HDMI ports, but nothing change (and in this moment it is connected into HDMI like RPi3 before - and with RPi3 CEC works without problem)
i have similar problem with LG TV (Simplink). Before this i have RPi3 B and worked it with this TV without problem. Now i bought RPi4 4GB version, and nothing. I tried both HDMI ports, wait to new version LibreELEC beta - and still nothing.
And i have question, for CEC functionality, can i use both of RPi ports, or CEC work only on specific HDMI (i tryed Google for answer, but no luck)?