How to perform a diagnostic test on a Chromebook

If your Chromebook either crashes or does not seem to be performing as it should. You can now perform a diagnostic test within ChromeOS. The diagnostic test will check the quality of your Internet connection, perform a battery test, run a series of CPU checks and confirm the status of your RAM.

Quick reference notes:

  • Open Search and type Diagnostics
  • Select the Diagnostics app

Connectivity Test

If you select Connectivity from the sidebar, the Diagnostics app will automatically start a WiFi test. This screen is useful in that not only will it confirm that you have an internet connection. You can also see specific information about the wireless connection your Chromebook is using.

Battery Test

By selecting System from the sidebar, and then choosing Run Charge/Discharge test, you can check the battery in your Chromebook. You will find that there are two different battery tests, one for when a Chromebook is running from battery, and one for when it is connected to the mains power. The results in Battery health, Cycle count and Current will also help you to determine if your Chromebook’s battery needs to be replaced.

For example you should probably consider changing your battery, if Battery health is below 50% and the battery no longer seems to hold its charge as well as it once did.

CPU Test

The CPU test will perform 4 tests which can help to determine if there is a problem with the processor in a Chromebook. It will also display the CPU’s current usage, temperature and speed. By stress testing a CPU you can often isolate if crashes are related to the CPU, RAM or software in your Chromebook.

Memory Test

By running a Memory Test you can see if you have faulty RAM in your Chromebook. As the memory test checks each part of the RAM in a computer, this test will take the longest amount of time to complete.

Reference materials:

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