I've got a 500 GB 2nd generation TC. I know a lot of these were prone to failures after about 18 months, but mine comes a little after the affected serial number range. It's been fine all these years since I bought it in probably early 2009. A month or so ago it stopped backing up, I don't recall the message I would get but just something generic about not being able to back up. TC light was green at this time, wifi worked fine. The other day I decided to upgrade my MBP with a new SSD (clean install of Mountain Lion (10.8.4) from a USB stick) and more RAM. Now that I've got my computer back up and running how I'd like it to, I figured I'd go ahead and figure out what was wrong with TC, figured I'd just reformat/erase it and start fresh. TC light was still green when I started this. Went into Airport utility, and it would should up there. Entered my password and it gave me the option to erase it, so I chose that. Nothing happened. Tried again, nothing happened. Shortly thereafter, it went MIA from Airport Utility and Airport Utility has not been able to find it since then. The light is now solid amber, and unplugging it as well as doing a reset with the button on the back do nothing. Additionally, I can hear a rhythmic click from the drive that I have never heard before. Wifi still works though, so the router part is at least still good I guess. Is my TC toast? Seems odd that as soon as I started messing with it it went from green light and discoverable (just unable to backup for some reason) to all out no good (amber light and unable to be found in Airport Utility). The clicking sound has me worried. Is it dead/dying or is there something else I can try?