I have a tivo premier and the hard drive failed. I replaced the original 320 gb with a 2 TB WD drive. Now, after plugging in the tivo, strange things are happening: 1. The tivo welcome, starting up screen appears for a second. 2. Screen goes blank. 3. ALL LED lights blink 4. "NO Signal" appears (I'm hooked up via HDMI). for a vew seconds 5. All leds blink etc. I need some advice on what to do next. Is 2 TB too big? Is there a secret code needed to start up when a new drive is installed? I've replaced the HD a couple of times on a series 2 tivo with no problems.