Hi,   By moving the server to your office, you have unplugged the power cable and the system has no power to it, that should lead the system to power flea which could help the situation. Usually we would request users do power flea on the system, to try revive the system up.    Updating firmware could help the hardware do better data calculation and processing, it can help resolve the error. What you can do is, try doing a support assist log collection via iDRAC and keep it for monitoring. Clear the logs and check if the error still occurs. 
PowerEdge R720xd server just died this morning with following error: Now, the server won't even boot up. When powered on, there is no display on the console. It just stays dark. The HDD lights blink for a moment on startup then go out. We haven't added/modified any hardware on the server. The firmware were updated about a year ago.
Server plain dead