I woke up to a loud swishing sound coming from my Tivo (assumably the hard drive) and the screen said, "Welcome, loading please wait." After unpluging and repluging the unit and calling customer service, I was told the unit was defective. Is this something that anyone has heard of happening before? What pissed me off was that I have to pay $60 to replace my defective unit, plus $12 to ship them the defective unit, and worst of all I'm without Tivo for the next few weeks at least. My second question is do the hack codes have any adverse effects on the Tivo unit? I don't want to do anything to the refurbished Tivo I'm getting that will cause me to be without again.