Use Diagnostics to troubleshoot your issue

You can use the Diagnostics app to check for hardware and connection problems on your Chromebook, like issues with the battery, CPU, memory or Wi-Fi.

Open Diagnostics

Important: Diagnostics is only available on Chrome OS devices that have version 90 and up. Learn how to update your Chromebook's operating system.

At the bottom right, select the time Settings .
Select About ChromeOS Diagnostics.

Tip: To find Diagnostics from your Chromebook's launcher, press the launcher key on your keyboard or select the launcher button at the bottom left of the screen and type Diagnostics in the search bar.

Learn about Diagnostics categories

Battery

Here you can find information about the state of your battery, like its health, cycle count, and electrical current.

Learn about the discharge test

This test measures the rate of charge and discharge over a fixed period of time for your Chromebook.

If the rate of charge and discharge is very low, there may be a problem with the battery or charging port.
You can troubleshoot more battery and charging issues. If you still run into trouble, contact your Chromebook manufacturer.

Connectivity

Here you will find information about the state of your internet connection. The app can help you find problems across Ethernet, Wi-Fi, cellular connections, and Google Services. When you open the app, it will automatically run tests for your default connection method.

Tip: To learn about your IP information, select IP Configuration

. To save a text file of your results, select Save test details

Learn about Google Services connectivity

You can diagnose and fix network issues that disrupt essential Chrome OS services with Google Services connectivity scan. It checks your device's ability to reach their required hostnames.

When you’re scanning, you can find 2 buttons: “Stop test” and “Show details.” After the scan stops, “Stop test” becomes “Run again.” If the scan is incomplete and the report isn’t available, the “Show details” button becomes disabled.

To restart the scan: Select Run again.
To stop the scan: Select Stop test.
To expand scan details: Select Show details.

You can still copy the report even if you cancel the scan. When your device is at the login screen, you can find the “See test details” button but you can't download the report. To download the report, sign in to the device.

Troubleshoot connection problems

If the app finds a DNS (Domain Name System) error, try these steps.
For other Wi-Fi, cellular, or Ethernet connection problems, use these steps.
If you still are having issues, save a text file of your results and contact your Chromebook manufacturer.
If you encounter issues with your Google Services connectivity, use this tool.

CPU

Important: CPU tests can stress the device and make regular use difficult. Your device may run slowly and tests may take a long time to run.

CPU tests help you find information about your CPU consumption, current usage, temperature, and speed.

Use the CPU graph

The CPU graph is a chart that monitors the CPU usage of your Chromebook. This can help troubleshoot performance issues and identify which applications use the most CPU resources.

Learn about CPU tests

The stress test mimics high-load situations that are CPU-intensive.
The cache test measures cache coherency.
The floating point accuracy test repeatedly performs floating point operations against preset values to check for accuracy.
The prime search test checks your CPU calculation of complex prime numbers.

Tip: If your Chromebook fails any of these tests, it may indicate CPU failure or improper device cooling. For more help, contact your Chromebook manufacturer.

Memory

The memory test measures system memory.

If your test fails this could indicate faulty memory. For more help, contact your Chromebook manufacturer.

Keyboard

On your computer, open Settings .
In the search bar, enter diagnostics.
From the dropdown, select Diagnostics Input The internal keyboard.
Select Test.
Follow the on-screen instructions.

Tips:

Be sure to stay in the same window while you test. If you leave the window, you’ll receive a message that says, "Keys aren’t tested when you’re using another window." The test can’t continue until you return.
If you continue to have problems, contact your Chromebook manufacturer.

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