I recently purchased and set up my first receiver: TX-NR708. I'm very, very happy, but also a newbie and am always working out issues (it's a learning experience).
One thing I need to learn, is in setting up my Harmony One (also new) to recover some of the functions from the 708. For example, when I hook my iPhone to the USB port, and select "Play Digital Music" (or whatever I named it), it all sets up accordingly now (TV on, to browse via TV menu), receiver powered and on net/usb input, and it "wakes up" my phone and browses to the top of my music files on it.
I've mapped some of the standard buttons that weren't mapped (such as the left, right, up, down arrows and the OK button) to navigate the music. I still can't figure one function out, though. How do I go up a menu using the Harmony One via the iPhone music listing on screen? I've tried many options and none seem to work. I'm trying to map it to the "go back" cicular button.