So... my grand, old Series 2 TiVo is stuck on the "Welcome... Powering Up" screen, basically. I've unplugged and replugged it a couple of times and I can get past the "Welcome" screen and use the DVR for all of about 5 minutes before it fails again and I'm stuck on the "Welcome" screen. From what I can tell, this means my HD is somehow failing. But here's my real queston: I have a Lifetime Service agreement. Should I call TiVo and get a replacement DVR? Or is that worth it?