Use Diagnostics to troubleshoot your issue

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

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.

  1. At the bottom right, select the time and then Settings .
  2. Select About Chrome OS and then 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.
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.
Here you can find information about your CPU consumption, current usage, temperature, and current speed.

Use the CPU graph

The CPU chart is a graph where blue represents your CPU usage and yellow represents the system usage. 

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.
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