Connect Your Laptop and LG TV to the Same Wi-Fi Network

Before you can cast anything, your laptop and LG TV must be on the same wireless network. Check your laptop's Wi-Fi settings and note which network you're connected to. On your LG TV, go to Settings, then Network, and select the same Wi-Fi network. Enter the password if prompted. Both devices need a stable connection—if either one keeps dropping the signal, casting will fail or disconnect.

If your TV doesn't show your Wi-Fi network in the list, move your router closer to the TV temporarily, or restart both the router and the TV. Wait about two minutes after restarting before trying to connect again. Your laptop should reconnect automatically once the TV is online.

Key Takeaways

  • Your laptop and LG TV must connect to the same Wi-Fi network before casting will work.
  • On Windows, open Chrome, click the three-dot menu, select "Cast", then choose your TV from the list.
  • On Mac, the process is identical—Chrome handles casting the same way on both operating systems.
  • If your TV doesn't appear in the Cast menu, restart both devices and make sure they're on the same network.
  • Casting your entire screen uses more bandwidth than casting a single tab, so close unnecessary programs first.

Cast from Chrome on Windows

Open Google Chrome on your Windows laptop. In the top right corner, click the three vertical dots (the menu button). Scroll down and click Cast. A small window will pop up showing available devices on your network. Your LG TV should appear in this list with its name or model number. Click on it to begin casting.

Chrome will ask whether you want to cast your entire screen or just a single tab. Choose Cast entire screen if you want to mirror everything your laptop displays. Choose Cast tab if you only want to send one browser tab to the TV—this uses less bandwidth and keeps other windows private on your laptop. Once you select an option, your laptop screen will appear on the TV within a few seconds.

To stop casting, click the Cast button again and select Stop casting. Your TV will return to its normal input, and your laptop will no longer send video to it.

Cast from Chrome on Mac

The process on a Mac is identical to Windows. Open Google Chrome and click the three vertical dots in the top right corner. Select Cast from the menu. Your LG TV will appear in the popup window if it's on the same network. Click the TV name to start casting, then choose whether to cast your entire screen or just a single tab.

Mac users sometimes see a slight delay before the TV appears in the Cast list—wait about 10 seconds after opening the Cast menu before assuming the TV isn't available. If it still doesn't show up, close the Cast menu, restart Chrome, and try again.

What to Do If Your TV Doesn't Appear in the Cast List

If you don't see your LG TV in the Cast menu, the most common cause is that your laptop and TV are on different networks. Double-check that both devices are connected to the same Wi-Fi name. Look at your laptop's network settings and your TV's network settings side by side to confirm they match exactly.

The second most common cause is that your TV's Chromecast feature is turned off or disabled. On your LG TV, go to Settings, then General, then Chromecast built-in (or Google Cast, depending on your TV model). Make sure it's set to On. If it's already on, toggle it off, wait 10 seconds, and toggle it back on.

If the TV still doesn't appear, restart both devices completely. Turn off your laptop and your TV, wait 30 seconds, and turn them back on. Reconnect your laptop to Wi-Fi, wait for the TV to fully boot, and try casting again. This clears temporary connection problems that prevent the devices from finding each other.

Improve Casting Performance and Reduce Lag

Casting works best when your Wi-Fi signal is strong. If your router is far from your TV or laptop, move it closer or position it in a central location. Thick walls and metal objects between the router and your devices weaken the signal and cause stuttering or disconnections.

Close unnecessary programs on your laptop before casting. Each open program uses bandwidth and processing power, which slows down the video stream to your TV. Close email clients, video calls, and background downloads. If you're casting a single tab instead of your entire screen, you can keep other tabs open without affecting performance.

If you're casting video and it keeps buffering, lower the video quality on the website you're watching. Most streaming services have a settings menu where you can choose 480p or 720p instead of 1080p or 4K. Lower quality uses less bandwidth and will play more smoothly over Wi-Fi.

Cast Audio and Video Separately

When you cast your screen, both audio and video go to the TV by default. If you want to watch something on your TV but keep the sound on your laptop speakers, you can change this in Chrome's settings. Open Chrome, click the three dots, go to Settings, then Advanced, then Privacy and security. Look for Cast media route policy and adjust it to control where audio plays.

Some LG TVs also have their own audio output settings. If you're casting and the sound is too loud or too quiet, check your TV's volume control first. If that doesn't help, check your laptop's volume and make sure Chrome isn't muted. Right-click the speaker icon in your system tray (Windows) or menu bar (Mac) to see which device is playing sound.

Troubleshoot Connection Drops and Freezing

If your cast connection drops frequently, your Wi-Fi signal is probably too weak. Move your router closer to your TV, or move your laptop closer to the router while you're casting. If you can't move the router, consider a Wi-Fi extender or a mesh network system to strengthen the signal in that room.

If the video freezes but audio continues, your bandwidth is being shared with other devices. Check whether anyone else in your home is downloading large files, streaming video, or video calling. Ask them to pause their activity temporarily, or cast during a time when fewer people are using the network.

If the entire cast freezes and won't respond, click the Cast button and select Stop casting. Wait 10 seconds, then try casting again. If it freezes when ready, restart your TV and try once more. Persistent freezing usually means your Wi-Fi network is overloaded or unstable.

Frequently Asked Questions

Can I cast from Firefox or Safari instead of Chrome?

No. Chromecast casting from a laptop requires Google Chrome. Firefox and Safari don't have built-in casting features for LG TVs. You can use Chrome even if it's not your default browser—just open Chrome specifically when you want to cast.

What if I want to cast from my phone instead of my laptop?

The process is similar but slightly different. On Android, open the app you want to cast from, tap the Cast icon (usually in the top right), and select your TV. On iPhone, swipe down from the top right corner to open Control Center, tap Screen Mirroring, and select your TV. The TV must still be on the same Wi-Fi network.

Will casting drain my laptop battery faster?

Yes, casting uses more power than normal laptop use because your Wi-Fi radio and screen are working harder. If you're casting for a long time, plug your laptop into power. Casting a single tab uses less battery than casting your entire screen.

Can I cast to multiple TVs at the same time?

No. Chrome can only cast to one device at a time. If you want to send the same content to multiple TVs, you would need to cast to one TV, stop, and then cast to the next one.

Why does my cast have a delay between what I do and what appears on the TV?

A small delay (usually one to two seconds) is normal and happens because the video has to be encoded, sent over Wi-Fi, and decoded by the TV. If the delay is longer than that, your Wi-Fi signal is weak or your laptop is processing too much. Close other programs and move closer to your router.