I have 2 Harmony Elites and 2 new LG OLED TV's the 65B6P and 65C7P. I have set up various activities with the TV's and am having lots of problems with the startup activity and input selection. It seems to be selecting the right HDMI input on the TV and the source device (e.g. DirecTV receiver) is powered on. However, it doesn't show the picture and the TV just says signal not detected. I often have to hit help one or more times or shut down a restart one or more times before it works. It doesn't seem to have a problem if the last time I was watching, before I shut everything off, was the same source device. I'm not sure if the way I set up the inputs on the TV effected this. I went byack and removed devices from the Device Connect setup in the TV but it is still having the problem.   Suggestions?
Thanks,
Marc

For some strange reason, the TV setup did not assign the input selection to the corresponding code but rather to the Exit key. The correct this:
Setting, Adjust inputs, Method 2, match Source input to Remote button

My setup is now working well, even with CEC enabled.

Marc,

Were you able to determine the exact cause of the disconnect with respect to LG's turn-on issues?

I have witnessed this very issue with my own LG 55" OLED as well with customer owned units. It kinda-sorta seems like a timing issue to my old and tired eyes...
the required handshake info is possibly not getting through or being parsed quickly enough?

I rearranged the turn-on sequence so that the DirecTV was first in the macro string, Denon AVR next, Input Select next and LG power next to last with the LG Input select the very last command being issuesd from the Harmony rmeote.