Use this procedure to completely remove power from the server. Changing the server from Main power mode to Standby power mode does not completely remove power from the server. If you need to completely remove power from the server to perform cold service or a cold reset or to place the server in a non-powered state, you must disconnect the AC power cables from the back of the server.
Use one of the power off methods. See Powering Down the Server.
This action completely removes power from the server.
For information about cold resets, see Power Control, Shutdown, and Reset States.