thanks I tried the soft reset and didn’t work. The cable is fine as I plugged it directly into a roku to the projector and 4k worked fine. For some reason the 4k out on the receiver just isn’t transmitting.
Do the hard reset. If that does not work, then you will have to weigh the cost of repair over replacement.
HDMI sockets are fragile and prone to failure. So you don't want to plug and unplug HDMI cable any more then you have to. Also make sure there is no unnecessary weight on the cables.
Your problem if reset fails, is either a fault on the HDMI board or a damaged HDMI socket. Either way the remedy is the same, a new HDMI board. Unfortunately that is an expensive repair and a tough choice you will have to make.