JC: MENU in ATV with the Beo4?
I have my ATV 2nd generation connected to the DVD port and setup with HDMI and a PUC set to Apple Remote.
[MENU] brings up the BeoVision's menu panel (connections, etc).
To bring up the ATV's menu (if it is in sleep mode) I use the < or > keys to flick between the invisible menu items, and that wakes up the ATV.
If I am deep into a menu tree, I use multiple [EXIT] ... [EXIT] commands to clmb back up the menu tree . . . .
I hope that helps you, but I have misunderstood the question I am happy to answer the question again :-)
First B&O (1976) was a Beogram 1500 ... latest (2011) change has been to couple the BL11 with the BL6Ks *sounds superb*