# 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" ![](https://761066130-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGM9W2DuBTgEXv1ClCm8H%2Fuploads%2Fgit-blob-984ee5bcd027683ce3ce3fd6985cd5eec9dc9a9d%2Fimage1.png?alt=media\&token=e182af11-ebb1-4754-a72c-66d9b157972c) 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 \ \ \
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