The Sun Blade X3-2B has two power modes, full power mode and standby power mode.
Full power mode is the normal operational mode for the server. When the server enters full power mode, power is supplied to all the server components, the server boots, and the operating system (OS) functions. You achieve full power mode by pressing the Power button on the server front panel when the server is in standby power mode. You can also achieve full power mode by powering on the server from Oracle ILOM. Once the server is operating in full power mode, the Power OK LED is on continuously (does not blink).
Standby power is a non-operating mode, where minimum power is supplied to the components that are required to run the service processor (SP), but the OS is not booted. To enter standby power mode, install the server into a fully-powered chassis, but do not press the front panel Power button. You can also enter standby power mode by powering off the server (from an operational full power mode) using one of the power-off methods (see below). In standby power mode, the front panel Power LED blinks quickly while the SP is booting, and slowly when the SP has booted.