It has been a couple of weeks since I started to hear a strange noise (a screech) from my Tivo in the early morning. It almost sound like someone is closing a rusty door. The noise only lasts a couple of seconds but will come back every so often (not at specific intervals). I have never heard it during the day, the evening or the early night. It seems to appear after midnight and is gone by seven in the morning. Any input of the possible cause and remedy to this problem would be greatly appreciated. By the way, I have a Tivo 2. Thank you.