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Use CROSH Diagnostics to troubleshoot hardware problems on Chrome OS devices - Acer Community
<main> <article class="userContent"> <h3 data-id="how-can-i-troubleshoot-the-hardware-on-my-chromebook-chromebase-or-chromebox">How can I troubleshoot the hardware on my Chromebook, Chromebase, or Chromebox?<br><br></h3> <p>The Chrome operating system includes a shell environment called Chrome Shell (CROSH). CROSH includes several diagnostic utilities that can be used on all Acer Chromebooks and Chromeboxes without enabling developer mode. Follow the steps below to lauch CROSH troubleshooting environment, then use the steps for each test to test your hardware.</p> <h2 data-id="launch-crosh-diagnostics">Launch CROSH Diagnostics:</h2> <ol><li>Power on the Chrome device.</li> <li><b>Login to Chrome</b> or select <b>Browse as a Guest</b>.</li> <li>Open the Chrome Browser.</li> <li>Press the <b>Ctrl</b> + <b>Alt</b> + <b>T</b> keys to open a CROSH terminal window.</li> </ol><p><img alt="image" src="https://us.v-cdn.net/6029997/uploads/migrated/acer_final/42977/crosh1.png" class="embedImage-img importedEmbed-img"></img></p> <h2 data-id="available-tests">Available Tests:</h2> <ol><li><a rel="nofollow" href="#battery">Battery Health and Charging test:</a></li> <li><a rel="nofollow" href="#storage">Hard drive/SSD storage short test:</a></li> <li><a rel="nofollow" href="#storage2">Hard drive/SSD storage long test:</a></li> <li><a rel="nofollow" href="#RAM">Memory (RAM) test:</a></li> </ol><br><a id="battery" name="battery"></a> <h2 data-id="battery-health-and-charging-test">Battery Health and Charging Test:</h2> <ol><li>Make sure the A/C adapter is plugged in.</li> <li>Type <b>battery_test 1</b> in the CROSH terminal and press <b>Enter</b>. (Note the space between battery_test and the number 1).</li> <li>Verify the text "<b>Battery is charging</b>" is shown. <ul><li>If it does not show that the battery is charging the A/C adapter may be defective, the battery may be defective, or there may be a different hardware issue.</li> <li>If the Battery Health Percentage is greater than 50%, the battery is within the expected wear limits.</li> <li>If the Battery health percentage is equal to or less than 50% and the battery is less than a year old, the battery is outside expected wear limits and might need to be replaced.</li> <li>If the test results show "<b>Battery is Unknown</b>" the battery might need to be replaced.</li> </ul></li> </ol><img alt="image" src="https://us.v-cdn.net/6029997/uploads/migrated/acer_final/42977/crosh2.png" class="embedImage-img importedEmbed-img"></img><h2 data-id="n-a"> </h2> <h2 data-id="n-a-1"> </h2> <h2 data-id="hard-drive-ssd-storage-short-test">Hard drive/SSD storage short test:</h2> <ol><li>Type <b>storage_test_1</b> into the CROSH terminal and press <b>Enter</b>.</li> <li>Verify the text "<b>Completed without error</b>" is shown. If the text "<b>Completed without error</b>" is not shown and one or more "<b>FAILING NOW</b>" statuses are shown, the storage device may be defective.</li> </ol> Note: If the Chrome device features eMMC storage the test will not return any results.<br><br><br><br><img alt="image" src="https://us.v-cdn.net/6029997/uploads/migrated/acer_final/42977/crosh3.png" class="embedImage-img importedEmbed-img"></img><br><br><br><br><a id="storage2" name="storage2"></a> <h2 data-id="n-a-2"> </h2> <h2 data-id="hard-drive-ssd-storage-long-test">Hard drive/SSD storage long test:</h2> <ol><li>Type <b>storage_test_2</b> into the CROSH terminal and press <b>Enter</b>.</li> <li>Verify the text "<b>Pass completed, 0 bad blocks found</b>" is shown. Check to see if any failures or bad blocks are shown. If there are failures shown the storage device may be defective.</li> </ol> Note: If the Chrome device features eMMC storage the test will not return any results.<br><br><br><br><img alt="image" src="https://us.v-cdn.net/6029997/uploads/migrated/acer_final/42977/crosh4.png" class="embedImage-img importedEmbed-img"></img><br><br><br><br><a id="RAM" name="RAM"></a> <h2 data-id="n-a-3"> </h2> <h2 data-id="memory-ram-test">Memory (RAM) Test:</h2> <ol><li>Type <b>memory_test</b> in the CROSH terminal and press <b>Enter</b>.</li> <li>Check that the status for each test is "<b>ok</b>" and the final status says "<b>Done</b>". If a failure status or error occurs during testing one or more memory DIMMs may be defective, or there may be a different hardware issue.</li> </ol><img alt="image" src="https://us.v-cdn.net/6029997/uploads/migrated/acer_final/42977/crosh5.png" class="embedImage-img importedEmbed-img"></img><br><meta content=""></meta> </article> </main>
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