I have a Series 2 single tuner unit which has a hard drive on its way out. Recently, a friend gave me his DT Series 2 unit after he upgraded. Since the service info is on the motherboard and not on the drive itself, I tried swapping to known good drive from the DT unit into mine, but did not get very far in the startup process. My Tivo unit displayed the "Starting up. Please wait." message and nothing more. The front panel indicators immediately went to amber/green and amber red. According to what I've read online, getting into diagnostics mode (kickstart?) requires the unit to go green, then amber before you press the pause button to initiate the diagnostics mode. Am I wrong in assuming that a fix could be as easy as a drive swap without an OS change? Or, are there other things to try here to address this? I know the HD controller still works, because I swapped the original drive back in and it started up successfully.