Drives me nuts that there's no cohesive list of Shutdown Causes... I have an Xserve3,1 that is occasionally (anywhere from once a day to once a week) shutting down entirely. No kernel panic...simply turning off. I can still power it back on via LOM, for whatever that's worth. Server Monitor shows all thermals and fan activity as healthy. Console lists "Previous Shutdown Cause: -105". I've also encountered this behavior during testing with other operating systems as well (Linux, 10.6, 10.11). ...and AXD (Apple Xserve Diagnostics) says all components pass with flying colors... I have seen no similar reports in web searches, and I'm hoping someone here can shed some light on what -105 points to... Thanks!