Hello,
Try both HDMI outputs.
I have the same behaviour with bith HDMI inputs
If you plug in to display and power on a Pi4 with no sdcard inserted you should see a diagnostic display. Does that work?
That will help confirm if there is a physical defect.
Thanks for the idea. I tried to boot without SD card and no signal in the TV, however in PC monitor is working fine, I have tried several times and the display diagnostic is always being displayed. Problem seems to be linked to communication between Rpi 4 and the TV.
Do you have any idea on what can I do, if even without SD card the RPi is not displaying in the TV?