Instructions
Insert a game cartridge into the slot on top of your Atari 5200 console and then push the "Power" button to turn on the unit.
Look at the red LED on top of your console near the right corner. If the LED is glowing red, then the console has power.
Check your TV screen if you don't see the LED glow. If the console is receiving power, you should see the Atari logo appear on the screen.