What You Need Before You Start

Chromecast installation takes about five minutes and requires only three things: the Chromecast device itself, a TV with an HDMI port, and a Wi-Fi network you can connect to. You do not need a cable box, a smart TV, or any special equipment beyond what most homes already have.

Before you plug anything in, locate your TV's HDMI ports — they are usually on the back or side, labeled HDMI 1, HDMI 2, and so on. Write down which port you plan to use, because you will need to switch your TV to that input after setup. If your TV is mounted on a wall, make sure the HDMI port you choose is accessible enough to plug in the Chromecast device.

You will also need a smartphone or tablet running Android or iOS, or a computer with Chrome browser. This device is what you use to send video, music, or photos to your TV — you do not need it during the actual physical setup, but you will need it when ready after to complete the connection.

Key Takeaways

  • Plug the Chromecast into an HDMI port on your TV, then switch your TV input to that port using your remote.
  • The Chromecast will display a setup code on your TV screen that you enter into the Google Home app on your phone to connect it to your Wi-Fi.
  • Once connected to Wi-Fi, you can cast from any compatible app on your phone, tablet, or computer to send content to your TV.
  • If your Chromecast does not appear on your TV screen after plugging in, try a different HDMI port or check that your TV is powered on.

Plug In the Device and Switch Your TV Input

Take the Chromecast out of the box and locate the HDMI connector on one end and the USB power port on the other. Plug the HDMI connector directly into the HDMI port you chose on your TV. The device is small and may stick out slightly from the back of your TV — this is normal and does not affect how it works.

Next, plug the USB power cable into the Chromecast's power port. The other end of the cable goes into a power outlet or into a USB port on your TV if your TV has one. Most TVs do not provide enough power through USB, so plugging into a wall outlet is more reliable. If you use a wall outlet, you may want to tuck the cable behind your TV or along the wall to keep it out of sight.

Turn on your TV and use your TV remote to switch the input to the HDMI port where you plugged in the Chromecast. For example, if you used HDMI 2, press the Input or Source button on your remote and select HDMI 2. You should see the Chromecast welcome screen appear on your TV within 10 to 15 seconds. If you see nothing, try waiting another 10 seconds, then try a different HDMI port.

Connect to Wi-Fi Using the Google Home App

On your smartphone or tablet, read the Google Home app from the Apple App Store or Google Play Store if you do not already have it. Open the app and tap the plus sign or "Create" button to add a new device. The app will ask you to select a device type — choose "Set up device" and then "Set up a new device in your home."

The app will search for nearby Chromecast devices and should find yours within a few seconds. Tap on your Chromecast when it appears in the list. Your TV screen will display a four-digit setup code. Enter this code into your phone to confirm that you are setting up the correct device — this prevents someone else's phone from accidentally connecting to your Chromecast.

After you enter the code, the app will ask you to select your Wi-Fi network from a list and enter your Wi-Fi password. Choose the same network your phone is connected to. The Chromecast will connect to Wi-Fi, which usually takes 30 to 60 seconds. Once connected, you can name your Chromecast (for example, "Living Room TV" or "Bedroom TV") and assign it to a room in your home if you have multiple Chromecast devices.

Test Your Connection by Casting Content

Once setup is complete, open any app on your phone that supports casting — YouTube, Netflix, Spotify, and Google Photos all work. Look for the cast icon, which looks like a rectangle with curved lines in the corner, usually in the top right or bottom right of the app. Tap the cast icon and select your Chromecast from the list of available devices.

Play a video, song, or photo. It should appear on your TV within a few seconds. If it does not, go back to the Google Home app, tap on your Chromecast device, and check that it shows "Connected" under the device name. If it shows "Offline," your Chromecast has lost its Wi-Fi connection — see the troubleshooting section below.

You can now cast from your phone while it is in your hand, in your pocket, or across the room. The Chromecast stays connected to your Wi-Fi even when your phone is not actively casting, so you can cast again anytime without repeating the setup steps.

What to Do If Your Chromecast Does Not Appear on Your TV

If you plugged in the Chromecast and your TV shows a blank screen or "No Signal," first check that the HDMI cable is fully inserted into both the TV and the Chromecast. Push it in firmly until you hear or feel a click. Then switch your TV input again using your remote — sometimes the TV does not automatically detect the new input.

If you still see nothing, try a different HDMI port on your TV. Some ports may not be active or may be reserved for other devices like cable boxes. Once you switch to a different port, wait 15 seconds for the Chromecast to boot up and display the welcome screen.

If the Chromecast still does not appear after trying multiple ports, unplug the power cable for 10 seconds, then plug it back in. This resets the device. Wait another 15 seconds and check your TV screen again. If you are still seeing nothing after this, the device may be faulty — contact Google support with your device serial number, which is printed on the back of the Chromecast.

What to Do If Your Phone Cannot Find the Chromecast

If the Google Home app does not find your Chromecast during setup, make sure your phone is connected to the same Wi-Fi network you plan to use for the Chromecast. The app searches for devices on your local network, so if your phone is on a different network, it will not see the Chromecast.

Also check that your Wi-Fi network is not a guest network or a 5 GHz-only network. Chromecast works best on standard 2.4 GHz Wi-Fi networks. If your router broadcasts both 2.4 GHz and 5 GHz, connect your phone to the 2.4 GHz band during setup, and the Chromecast will follow.

If you have already completed setup but your phone no longer sees the Chromecast in the cast menu, open the Google Home app and check the device status. If it shows "Offline," your Chromecast has lost its Wi-Fi connection. Unplug the power cable for 10 seconds, plug it back in, and wait for it to reconnect. This usually takes one to two minutes.

Frequently Asked Questions

Do I need a Google account to use Chromecast?

Yes. You need a Google account to set up Chromecast through the Google Home app. If you do not have one, you can create a free account at google.com. You do not need a paid subscription or any special service — just the account itself.

Can I cast from my computer to Chromecast?

Yes. If you use Chrome browser on a Windows, Mac, or Linux computer, you can cast tabs or your entire screen to Chromecast. Open Chrome, click the three-dot menu, select "Cast," and choose your Chromecast device. Not all websites support casting, but YouTube, Netflix, and most streaming services do.

What if I forget my Wi-Fi password during setup?

You can reset your Chromecast and start over. Unplug the power cable, hold down the reset button on the back of the device (you may need a paperclip or pin), and plug the power back in while holding the button. Hold for about 10 seconds until the light blinks. Release the button and wait 30 seconds — the Chromecast will restart and show the setup screen again.

Can multiple people cast to the same Chromecast at the same time?

Only one person can cast video or audio at a time — the last person to cast takes over the TV. However, multiple people can take turns casting by tapping the cast icon in their app and selecting the same Chromecast device. The previous cast stops and the new one starts when ready.

Does Chromecast work with older TVs?

Chromecast works with any TV that has an HDMI port, regardless of age or brand. If your TV does not have HDMI, you cannot use Chromecast. Some very old TVs may have only composite (red, white, yellow) cables — in that case, Chromecast is not compatible.