When the server is connected to an ac power source but is not turned on, the operating system does not run, and all core logic except for the Integrated Management Module 2.1 (IMM2.1) is shutdown.
However, the server can respond to requests from Integrated Management Module 2.1 (IMM2.1), such as a remote request to turn on the server. The power-on LED flashes to indicate that the server is connected to ac power but is not turned on.