# Troubleshooting "Failed to send WATCHDOG=1 notification message:" on the NextSeq 1000/2000

NextSeq 1000/2000 users may see the following error appear on a black screen.

"Failed to send WATCHDOG=1 notification message: Transport endpoint is not connected"

![](/files/coGEHS58POxg6bQEWjuP)

This message is typically indicative that there are files being transferred while a user is attempting to perform another process that would affect that transfer. This can be resolved with a slow power cycle of the instrument.

**How to Power Cycle the NextSeq 1000/2000**

1. In the control software, open the hamburger menu (three horizontal lines) and select **Shutdown Instrument**.
2. Once the instrument is off, toggle the power switch to the **OFF** position.
3. Wait a minimum of 5 minutes with the instrument powered completely off.
4. Toggle the power switch to the **ON** position.
5. Once the power button on the front right of the instrument is pulsing with light, press it.
6. If this does not resolve the error, contact Illumina Technical Support at <techsupport@illumina.com>

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #7809), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000007809%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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