There is no other alternative.
The AC outlet (switched) on the back of your 805 is ON, when your receiver is turn ON (Standby).
And it is OFF, when your receiver is turn OFF.
-> There is no such button, or way to reset the AC outlet to another mode (unswitched).
* See page 42, at the bottom, in your 805's manual.
** If your 805 is acting differently than the above, you then have an issue.
And that will be the very first time I've seen this acting abnormally. ...Seems very unlikely.