No Cast devices found?

There are a variety of issues that may prevent Chrome from detecting available Cast devices. The steps below will help you to identify and resolve the most common issues that can cause this behavior.

Basic troubleshooting
  1. Check that your Chromecast is set up correctly and connected to Wi-Fi. You should see it on your TV, with its assigned name and the current time, and cycling through photos.
  2. In the Google Cast extension menu, if you see a message indicating “Unable to connect to some devices” with a specific error code, read the section below for information on that specific error.
  3. Certain operating system settings can conflict with the use of Chromecast. Read the section below for troubleshooting steps specific to your operating system.
  4. If other devices (e.g. phones, tablets) are also unable to cast successfully, then it's likely an issue with your router or network. Try rebooting your Wi-Fi router by unplugging and plugging the power source. In addition, make sure that Chromecast and your devices are connected to the same network. If you are able to configure your Wi-Fi router and it supports these settings, ensure that AP isolation is off and that multicast forwarding is enabled.
  5. If other devices have no issues with casting, then issues with your computer and/or Chrome are likely. Make sure your computer is on the same network as Chromecast, disconnect from Virtual Private Networks (VPNs) or proxy servers, and ensure that firewall/antivirus software are up to date and aren’t blocking connections to Chromecast.
  6. If the above steps don’t resolve your issues, try rebooting your Wi-Fi router (unless you already did so in step #2), your Chromecast, and your computer. This can help to clear temporary issues.


Still having trouble? Try these browser-specific steps: Running OSX on a Mac?
On Mac, if Chrome isn’t allowed to accept connections, it won’t be able to communicate with Chromecast. Check that the Chrome allows this by following the steps below:
  1. In the top left corner, click the Apple icon.
  2. Open System Preferences > Security > Firewall.
  3. If the firewall is enabled, go to Firewall options (otherwise, skip remaining steps).
  4. If "Block all incoming connections" is enabled, disable this setting, save your settings, reboot Chrome (completely exit and start it up again) and try again.
  5. If "Automatically allow signed software to connect" is enabled then make sure that there is not an entry for Google Chrome in the application list.
  6. If "Automatically allow signed software to connect" is not enabled, click the "+" button > navigate to Chrome in /Applications > select it.
Running Windows 7 or Vista on your desktop or laptop?
Windows distinguishes networks as being either Home/Work or Public; however, communication with devices like Chromecast is blocked on Public networks. You can check this setting as follows:
  1. Open ‘Network & Sharing Center’ by clicking on the network icon in the Windows system tray or from Control Panel.
  2. Under ‘View your active networks’ you should see your network (typically the name of your Wi-Fi Access Point.)
  3. If you see ‘Public Network’ under your network with a park bench icon, then this is likely an issue preventing Chrome from communicating with your Chromecast device.
  4. To change this setting, click on the network and click Home network.
  5. Reboot Chrome (completely exit and start it up again) and try again. If that doesn’t work, reboot your computer/laptop and try again.
Running Windows 8/8.1 on your desktop or laptop?
Windows 8 and 8.1 have sharing settings that must be set to ON. The steps to do this differ slightly depending on operating system version.

On Windows 8.1 (most users), you can do the following:

  1. Navigate to Settings. To do this, move your mouse to the far right of the screen to show the menu bar. Settings will be at the bottom.
  2. Select Change PC Settings (et the very bottom of the Settings menu).
  3. Select Network.
  4. Select your connected Wi-Fi network (next to Wi-Fi bar image).
  5. Under Find Devices and Content, make sure it is set to On.

If you are running Windows 8, you can do the following:

  1. Navigate to your Desktop. (Your Desktop will be one of the default tiles on your homescreen).
  2. Click on your Wi-Fi settings on the bottom of your desktop bar (at the very bottom, right hand side of your Desktop).
  3. Right click on your connected Wi-Fi network.
  4. Select Turn sharing on or off.
  5. Make sure sharing is set to On.


Here's how to resolve a few of the most common error messages: Authentication Error (error 1001)
This error indicates that Chrome is able to connect to Chromecast, but can't establish a secure connection due to an authentication error. To fix this issue:
  1. Make sure your antivirus software is up to date by installing any updates from the manufacturer.
  2. If you are running AVG, the latest updates should correct issues with Chromecast. In older versions, click Options > Advanced Settings > Web Browsing Protection > Online Shield > Expert Settings. Clear the setting marked Web Browsing Protection. Restart Chrome after changing this setting.
  3. If you are running Kaspersky, under Network Settings, disable Scan Encrypted Connections. After making this change, you should immediately be able to find devices.
  4. For other anti-virus software, look for options related to SSL, TLS, or encrypted connection scanning. You might also try temporarily disabling or uninstalling anti-virus software to confirm that it is the source of the issue.
  5. In some Chrome versions, error 1001 may also occur due to clock synchronization; please see error 1005 below.
Connection Errors (errors 1002, 1003)
This error indicates that Chrome discovered a device on the network, but cannot establish a connection to it. These errors are usually caused by router or networking settings. Please ensure that AP isolation is disabled on your router, and that any firewall features on your router that might block incoming connections to your Chromecast are not enabled.
Clock Synchronization Issues (error 1005)
  1. Check whether your computer clock is out-of-sync with current Internet time. A useful site is, which will report the time difference between your computer and the actual time. If your clock is within several hours, you can skip further steps.
  2. If you set your time manually, check that it is set correctly including the timezone. If your clock shows the correct local time, but is set to a non-local timezone, this may be the cause the issue.
  3. Preferably, enable automatic time synchronization so that your clock is always up to date.


The troubleshooting tips listed above are only intended to resolve Chromecast set up issues and may have unintended consequences. If you have questions or concerns, please consult your router manufacturer or ISP before making these changes.

Still need help? Check out the related questions below from our help forum.

Elise is a Chromecast expert and author of this help page. Leave her feedback below about the page.

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