For humax 5400 and 5400Z, if you patch the firmware with the ToH one, you can create a macro inside the receiver itself.
I have done it and I have associated the blue button of the remote (it's almost useless) to the on/off command.
In this way if the humax is OFF the macro is not working and the STB remains off.
Il the STB is ON and you press the blue button, if switches OFF.
It works great.
If you need any assistance for patching the humax and for creating a macro inside the firmware I'm available at the following address:
[email protected].
Ciao
miazza