I woke up today to all lights on my Roamio flashing & stuck on the "Welcome" screen. -unplugged it for around 15 minutes, plugged back in -tried 2 different power cords -opened it up, removed the hard drive (500GB Seagate) I have a 4 bay external dock I attempted to use to scan the drive for errors for the dock would not even power on with the hard drive inserted. -I connected the drive directly to my Windows PC. On first attempt, the PC would not power on. Unplugged the PC & tried again. This time it powered on but the hard drive immediately started to give off a "burning" odor so I shut the computer off right away. -I have many spare hard drives, however, they aren't the same "slim" size as the one the Tivo came with but I figured I'd use one temporarily until I could buy a replacement. I connected a 2TB Seagate to the Tivo, plugged it in and it was in an endless boot attempt cycle. Tried a second drive, had the same result. at this point I have no idea what else can be done. I even tried turning on the Tivo with no hard drive as a longshot thinking I'd at least be able to watch TV but it's stuck on the "welcome" screen. Any help is appreciated.