Raspberry Pi 4 b - Powering On and Booting Your Raspberry Pi; Initial Power-On Procedure

7/1/2019 Setting up your Raspberry Pi | Raspberry Pi Projects
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Step 5
Start up your Raspberry Pi
Your Raspberry Pi doesn’t have a power switch: as soon as you connect it to a power outlet, it will turn on.
Plug the USB power supply into a socket and connect it to your Raspberry Pi’s power port.
You should see a red LED light up on the Raspberry Pi, which indicates that Raspberry Pi is connected to
power. As it starts up (this is also called booting), you will see raspberries appear in the top left-hand
corner of your screen.