# Troubleshooting Black Chromium Screen on the iSeq 100

When users open Chromium on the iSeq 100 and find the window is entirely black, sometimes users may be able to type in the address bar, but the window itself will not change, even when refreshed. This may result from a communications issue on the instrument or a side-effect of hardware acceleration in Google Chromium.

**To troubleshoot this issue:**

1. Power Cycle the instrument as described in the **Knowledge Base article Power Cycling the iSeq 100**. Reopen Chromium once the instrument re-initializes.
2. Turn off Hardware Acceleration in Chromium as follows:
   1. Create a Google Chromium shortcut on theDesktop
   2. Right-click the shortcut, and select **Properties**.
   3. Select **Shortcuts** tab.
   4. In the Target window, add the following text: "\[space]-disable-gpu" (the path should look like chrome.exe” -disable-gpu”).
   5. Save changes.
   6. Open Chrome and select **Settings** > **Show advanced settings**.
   7. Disable the **Use hardware acceleration when available** option.

If these steps do not re-establish Chromium's normal function, contact [Illumina Technical Support](https://support.illumina.com/).

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #7019), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000007019%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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