I am pretty Tivo new as we got our first 40 hr unit at Christmas. It was bought from Best Buy and we have had no problems. But we bought a 300 hr Series 2 unit straight from Tivo first week of January. We've been using it just over 2 weeks now and it has begun crashing. Last weekend I was away and my wife said it just stopped showing channels and the last few recordings that it did had no data. A power off and back on solved that problem. However, yesterday evening I tried to watch TV with it and it crashed. It was in the middle of recording something and when I tried to go to Tivo Central the unit began making this intermittent high-pitched squealing noise and the response to remote commands was stuttery like it was locking up. It eventually went back to "Powering Up" screen. I turned of power for a few seconds to reboot it and it worked fine for the next 1.5 hours while I was watching recorded shows. Today, basically the same thing. I turned on TV and the Tivo was recording something it chose to record. As soon as I went to Tivo Central I began hearing high-pitched squealing noise... not sure if it's coming straight from the HD or what. After less than a minute of on and off squealing and jerky display it went to "Powering Up" screen. I left it on its own long enough to see if it was actually going to reboot, but it didn't- just stayed on that screen. I powered it off for 20 seconds and back on and it rebooted. I'm about to call Tivo and tell them to replace it but was wondering if anyone else has had these problems with a new unit, particularly this latest 300 hr model?