I have a Harmony 880 and I read
this (also see pasted below) Harmony tutorial on the XBMC site but I don't know the 3 key press sequence that allows my DVD remote to shut off the XBox - let alone start it. My Harmony does allow complete macro programming so if what this guys says - it should work.
How to turn your Xbox ON and OFF
The Problem:
Some Logitech Harmony Remotes don't allow real macro-programming.
For example it is not possible on some Harmony Remotes to automatically run some button commands only with a single-button press. This is bad when you have a Infrared-MOD in your XBox and can't turn your XBox ON and OFF with a single button-press because the Infrared-MOD uses a special button combination (example: STOP-STOP-SELECT).
The Solution:
* Just go to the Logitech Member Website and sign in
* go to your XBOX Device and click on "More Options"
* Now click on "Learn Infrared Signals"
* Scroll down the whole list and click on the "Advanced Configuration" Button at the end of the page
* Now you can create new commands and name them "PowerON" and "PowerOFF" or you can edit the existing commands
* Be sure that you learn the new commands in BINARY MODE (Raw Mode)!! So click the "Learn Binary Commands" Button
* Now just press the Button combination required for your XBox to turn on (example: STOP-STOP-SELECT - One Button after the other!)
* Now you get an Error-Message that the command is too long. YOU CAN IGNORE this Error Message!
* Just repeat the process with the buttons again (example: STOP-STOP-SELECT - One Button after the other!)
* Now the command has been recognized!
Repeat the whole procedure for the "PowerOFF" Button and thats it!
Now you can turn your XBox ON and OFF with a single Button press.