# Flow cell is not detected error on the NextSeq 1000/2000

**Background:** When starting a run, the NextSeq 1000/2000 can present an error that the "flow cell is not detected" despite a properly loaded flow cell.

![](https://761066130-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGM9W2DuBTgEXv1ClCm8H%2Fuploads%2Fgit-blob-573ea2260a69dbcea8e80926e1bcd059cebd41d2%2Fimage1.jpg?alt=media\&token=148e6ba9-9f75-48f7-9f97-6230d4c1fad4)

**To troubleshoot:**

1. Investigate the flow cell seating and cleanliness.

* Retry by reseating the flow cell.

2. Power cycle\* the system.

* Confirm failure to recognize the flow cell persists through the power cycle.
* \*For further information, see the Knowledge Base articles [How to power cycle the NextSeq 1000/2000](https://knowledge.illumina.com/instrumentation/nextseq-1000-2000/instrumentation-nextseq-1000-2000-reference_material-list/000003038) and [How To Power Cycle NextSeq 1000/2000 Video](https://knowledge.illumina.com/instrumentation/nextseq-1000-2000/instrumentation-nextseq-1000-2000-troubleshooting-list/000005552).

3. If issue persists, prepare the requested information below and contact [Illumina Technical Support](https://www.illumina.com/company/contact-us.html#/united-states/technical-support) for further guidance.

**When reaching out to Illumina Technical Support, provide the following:**

* **Control Software Logs**: /usr /local/Illumina/Logs/nextseq1k2k-control-software
* **Service Software Logs**: /usr /local/Illumina/Logs/nextseq1k2k-service-software

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #6639), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000006639%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |