Hello, this is my first post to the forum. I know part of this has been covered, which is how I came to discover the root cause in the first place (i.e., searching these forums), but I have not seen any good solutions specific to the 2809 CI. I have even read through Batpig's excellent FAQ and Denon to English Dictionary. If it's been covered in this specific thread, forgive me, I've read a good portion of it but not all of it just yet (but I"m getting there!).
My problem is that when I switch on my TV (Sharp Aquous LC37D64U), for about 10 minutes or so it spews out a lot of IR radiation. I am using a Harmony 890 with the 2809CI, using the RF extender, one of the outputs of which is plugged directly to the "Room To Room" input on the back of the Denon. All works well except for that first 10 minutes or so when the TV is turned on, the harmony barely works with the Denon, though all other devices get control just fine. The other devices are using those little IR emitters. I'm guessing that if there is anything detected on the front IR, this overrides the rear input to the point where it ignores it altogether, even if the IR being received isn't anything the Denon recognizes as a valid command. If I cover the IR receiver in front with something (hand, electrical tape, etc), the Harmony works great (via RF). When the TV is warming up, I can still use the original remote, though occasionally it will seem to lag or miss a button press.
My question is: Is there an easy way with software to disable the IR receiver on the front? Preferably it would be something easy to re-enable from the front panel if / when needed. But even if not, I have managed to get the Harmony to do most of the things the included remote will, so worst case scenario I guess I can just cover the IR input. But this kind of defeats the whole purpose of not using an IR emitter in the first place, I think it looks a bit silly and, in theory at least, the direct room to room input should be more reliable, if I could disable the IR on th front at least.
By the way, I found a few inconsistencies in the harmony database, at least I believe so. I believe that the iPod and DVR/VCR input selectors are reversed. The Dynamic mode switching (Dyn on the remote) seemed to be missing, had to "learn" that command from the remote. Other than that, seems to work pretty well.