Originally Posted by Mike99
Mine does not go back into the sleep mode after a scheduled recording either.
Sorry... this is simply not proper behavior for the box. Never has been on earlier models of the product family, nor is it the correct behavior on this model. It is simply not the way unattended timer recordings are supposed to function.
If the unit is OFF to begin with, and a timer event triggers, the box will wake up (in audio-MUTE state). I believe it will always be the background tuner which will be activated for the recording (red REC light showing on display of the box), unless you have two recordings scheduled for the same time in which case both tuners will fire up (and you'll have both red REC showing for the background tuner as well as "REC" showing on the main display for the foreground tuner).
When the recording(s) is/are complete it will go back to sleep. This is absolutely the design. My DCX3400 here in TWC/LA (22.37) recorded six Sunday shows today completely unattended... it was off when this day started and it is off now that this day is ended, and all Sunday shows are recorded just as they should be. This is always how it performs. I leave my DVR powered off whenever I'm not watching something, and it always records everything I've pre-scheduled and it never remains on after the final recording is completed. It always returns to sleep.
The only thing which will change this design is if you touch a button on the remote that "talks" to the DVR while the unattended timer event recording is taking place... like for example swapping tuners so that you can watch a live channel (say, two recordings were going, and the background tuner finished first, and you want to let the foreground tuner recording continue but you want to watch something live using the background tuner... thus reversing "foreground" and "background"), or maybe pushing your "MyDVR" button to watch a recording from your list, or touching anything to un-mute and get audio so you can hear the show that's currently being recorded, etc..
For any of these remote button actions of any kind that serve to tell the DVR that a human being is present, the DVR will now (a) un-MUTE, and (b) prevent the going back to sleep of the box when the current recording(s) is complete. Otherwise, in the absence of a human-indicator via button push that go-to-sleep-when-done is NOT the appropriate action when the final recording completes, the box should return to off/sleep state when the timer recording events complete.
If it doesn't, then something's not working correctly with your DVR.