Open the main power switch cover, and push the main power switch.
The main power indicator goes on.
After you switch the main power on, a screen may appear to indicate that the machine is initializing. Do not switch the power off during this process. Initialization takes about 13 minutes.
If the machine does not turn on even if you press the main power switch, open the front left covers and make sure that the AC power switch is turned on. For details about the AC power switch, see "Dos and Don'ts", Maintenance and Management.