Wow thanks for your help, I may of been rash but I using you info about the reset pins I did a test and it seems to work perfect. I can power on after a halt and if needed do a hard reset.
I just connected
doorbell 3.3v to GPIO 3.3v
doorbell ground to GPIO ground
doorbell negative speaker to square reset pin
nothing else the circle reset pin is not used.
Using your info from the pins and this section of the X-box tutorial let me feel safe enough to try this.
Normally, when you press the power button on your XBox, all that is happening is that a signal is being grounded, thereby telling the XBox to turn on or off. So by connecting the - speaker lead to the GND side of the power button, we're essentially giving the XBox an alternate, hands-free GND source.
I will make a Youtube video to show this working as soon as I get time.