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Chromecast with Google TV shows “Low power” or g.co/cast/power

The “Low power” or g.co/cast/power warning means a supported Google streaming device is not receiving enough power. Use its included adapter and cable in a wall outlet, and remove any intervening USB-C hub or switch.

Published by TV Remotely · Source checked 2026-10-29. Model and firmware behavior can differ; device tests are named only where performed.

Use the included adapter and cable

Google says the Low power or g.co/cast/power warning appears when Chromecast with Google TV or Google TV Streamer (4K) lacks enough power. Connect the device to its included power adapter and cable, then plug the adapter into a reliable wall outlet. A TV USB port or substitute adapter may not supply enough power.

  1. Remove any USB-C hub or switch between the streaming device and its adapter.

    Google warns these can affect power delivery compatibility.

    If that does not help: Connect the device directly to its adapter.

  2. Check both ends of the supplied cable and reseat them.

    A loose connection can interrupt power.

    If that does not help: Unplug the cable from the device and adapter, wait five seconds, then reconnect adapter-side first and device-side second.

  3. If the original adapter must be replaced, use Google’s documented 5V/1.5A specification.

    This is the recommended replacement adapter specification in Google’s troubleshooting.

    If that does not help: Use the supplied cable; Google warns another cable may be unsupported and can cause restart loops.

Check which device the warning applies to

Google’s linked troubleshooting names Chromecast with Google TV and Google TV Streamer (4K). Do not apply its specific adapter specification to every Android TV box or built-in Google TV television. For a different model, use its own power requirements and support documentation.

What to do next

Use the included Google streaming-device power supply and cable; the cited low-power steps do not apply to every Android TV.

Sources and verification

Frequently asked questions

Can I power Chromecast with Google TV from the TV USB port?
Google says the TV USB port may not provide enough power and recommends the included power adapter.
Will any USB-C hub work?
Google warns that hubs or switches between the streaming device and adapter can affect power capability or delivery compatibility.