Hi Doug, I have moved your post to its own thread.
We need a bit more info from you to try and help. First up, can you confirm you are on FW V004 and please advise what remote are you using to try and power up.
I assume you are talking about the settings under "Power-key Definition" and if so then your device is not acting normal. I am a little confused as to why you would use the reset button, this is not clear and "unplug" could you clarify if is this the power cord or HDMI cable you are talking about?
When you set "Power-key Definition" to "Shutdown" and you hit the power button on the remote do you get the screen stating "Shutting down"?
Once powered off and you hit the power button on the remote do you see the blue LED light up in front of the U22?
Lets start with these and hopefully we can get to the bottom of it.