Do not turn off the main power switch immediately after turning it on. Doing so may result in damage to the hard disk or memory, leading to malfunctions.
After turning off the main power switch, wait for two minutes or more before turning it on again.
Make sure the power cord is firmly plugged into the wall outlet.
Open the front left cover.
Turn on the main power switch.
The main power indicator goes on.
Close the front left cover.
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 three minutes.