The RTC Alarm feature can be used to "wake up" the computer in real time after powering down. This feature can sometimes be found in the "Power Management" section of the motherboard's BIOS setup. Below is the BIOS setup guide for this feature.
Step 1. Press the switch to turn on the computer
Step 2. Press the "DEL" key on your keyboard before the computer enters Windows into BIOS. Use the arrow keys on your keyboard to select "Systeme Power Management" and press "Enter" to enter the RTC alarm settings.
Step 3. Change the "Wake System from S5" setting to [Fixed Time]; change " Wake up day of month" to the month you want, "0" stand for every month; set exact hour you want for "Wake up hour"; set exact minute you want for "Wake up minute"; set exact second you want for "Wake up second". Press F4 to save the settings and exit BIOS.
Now it will automatically turn on at the time you just set after you turn off your mini computer.