Smart Home Error chromecast-source-not-supported: Chromecast Source Not Supported
This error typically occurs when streaming drm-protected content from a non-certified app. Below you'll find 5 proven fixes to resolve it.
What Causes Smart Home Error chromecast-source-not-supported?
Smart Home error chromecast-source-not-supported (Chromecast Source Not Supported) can be triggered by several issues:
- Streaming DRM-protected content from a non-certified app
- Incompatible or outdated casting app not supporting Chromecast protocol
- HDCP (copy protection) handshake failure between Chromecast and TV
- Outdated Chromecast firmware unable to handle newer content protection
- TV or receiver HDMI port not supporting HDCP 2.2 for premium content
How to Fix Smart Home Error chromecast-source-not-supported — Step by Step
Use an official supported app
Chromecast works best with officially supported apps: YouTube, Netflix, Disney+, Spotify, and others listed at cast.google.com/apps. Third-party screen mirroring apps that cast DRM content often trigger this error.
Check the HDMI connection
Remove the Chromecast from the HDMI port and reinsert it firmly. Try a different HDMI port on your TV — some ports only support HDCP 1.4 while others support HDCP 2.2 required for 4K content.
Update Chromecast firmware
Open the Google Home app > select your Chromecast > Settings > Device information > check the firmware version. If an update is available, it installs automatically when the Chromecast is idle on the home screen.
Restart and factory reset Chromecast
Hold the button on the Chromecast for 25 seconds until the LED flashes. Release. The Chromecast will reboot and reset. Reconnect through the Google Home app.
Try casting from Chrome browser
On a PC, open Chrome > click the three dots > Cast > select your Chromecast. Chrome casting uses a different protocol that bypasses some source restrictions for non-DRM content.
Still Getting Error chromecast-source-not-supported?
IT Cares can diagnose and fix this error remotely — usually in under 30 minutes.
Frequently Asked Questions
What does Source Not Supported mean on Chromecast?
Chromecast received a cast request but the content source is either DRM-protected content being cast through an unsupported method, or the cast app is not communicating in the correct protocol.
Can I cast any screen to Chromecast?
You can mirror your Android phone screen (Google Home > Cast my screen) or a Chrome tab from a PC. However, some apps disable screen mirroring for DRM-protected content like Netflix — use the official in-app cast button instead.
Why does 4K content fail but HD works?
4K HDR content requires HDCP 2.2 copy protection which some older TVs only support on specific HDMI ports. Check your TV manual for which port supports HDCP 2.2.
Does Chromecast work with all TVs?
Any TV with an HDMI port works. However, 4K Chromecast with Google TV requires a 4K TV and an HDMI port with HDCP 2.2 for 4K content. Standard HD content works on any HDMI TV.
Can I cast from iPhone to Chromecast?
Yes, via the cast icon within supported apps (YouTube, Netflix, etc.). You cannot mirror the entire iPhone screen to Chromecast — for that, use AirPlay with an Apple TV.
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