I unplugged my Premier XL4 last night and when I plugged it back in it would not power on. I let it set for a long time and plugged it in and still no luck. i then took all the cables and Cablecard out and let it set and plugged it in. No luck there either. I called Tivo and they suggested all the above and then gave up and are sending me a new one. So I left it all unplugged and everything last night. Out of curiosity, I plugged it in this morning. Id did not immediately power one. After a couple hours I went and checked it again and it is powered on now. I've noticed something like this before. Is there a trick to getting this thing to power on? I will replace the box with what they send me, but am more curious about what is going on with this thing. I remembered reading a thread that I can't find now about having to unplug the cables to get it to power on.