[tjost]

CEC issues are often resolved by powering off (unplug from mains for a few minutes) the TV and any other CEC devices.
When connecting up again start just by connecting TV and Pi through HDMI (without other HDMI devices connected initially).

You may need to check TV user guide for how to enable CEC and choose the CEC device (most TV's do this automatically, but there is a lot of differences in implementation).

If it doesn't work try a different hdmi cable (ideally the one that worked before). Cheap hdmi cables may not have all lines wires up.

I checked all that no luck.
now I do need to change the pi and maybe this will resolve the problem. I do report back.