This key initiates the sequential power-on of the power supplies of the entire /390 system (/390-CPU, AROMA, CHE boxes). They are powered on independently of an automatic power-on/off function.
IMPL (Initial Micro Program Load) is then performed. The system is ready when POWER ON lights up and the status indicator displays 000.
When POWER ON IPL is configured, the operating system is then loaded (see SVP frame LOAD PRESET1, "Server Unit /390” Operating Manual [2]).
Before pressing the POWER ON key, check whether the following requirements are met:
POWER ON is flashing and the status indicator displays nothing. When all displays are off and the status indicator displays nothing, the power supply of the Server Unit is switched off. In this case switch the fuses in the power distribution cabinet on to supply the Server Unit with power.
The status indicator displays no error code. If an error code is displayed, notify Customer Service of this error code.
Press the POWER ON key to begin powering up the system. The power-up sequence begins. POWER ON lights up and the status indicator displays a sequence from 001 through 399 while powering up.
The system is ready when POWER ON lights up and the status indicator displays 000. If the status indicator displays an error code, an error occurred while powering up. In this case notify Customer Service of this error code.