---
title: "TDD20/TDD21: Not Connecting error message"
description: If you are receiving this message, it's likely the signal transmission has been disabled using the Signal button
---

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# TDD20/TDD21: Not Connecting error message

If you are receiving this message, it's likely the signal transmission has been disabled using the Signal button. To correct this, follow these steps:

1. Press the Signal Button on the transmitter unit.  
   ![](https://support.nyrius.com/hs-fs/hubfs/Knowledge%20Base%20Import/image-png-May-06-2026-02-39-33-6468-PM-1.png?width=389&height=211&name=image-png-May-06-2026-02-39-33-6468-PM-1.png)
2. If the units still aren't communicating you may need to pair them manually.
3. Using a paperclip, or similar item, **press and hold** the pinhole Reset button on the Receiver for **5 secs**. The LED will **blink slowly** when in pairing mode.  
   ![](https://support.nyrius.com/hs-fs/hubfs/Knowledge%20Base%20Import/image-png-May-06-2026-02-39-49-4513-PM-1.png?width=408&height=214&name=image-png-May-06-2026-02-39-49-4513-PM-1.png)
4. **Press and hold** the Signal button on the Transmitter for **5 secs**. The TV will display a "Success" message when pairing is complete.   
   ![](https://support.nyrius.com/hs-fs/hubfs/Knowledge%20Base%20Import/image-png-May-06-2026-02-39-33-6468-PM-1.png?width=389&height=211&name=image-png-May-06-2026-02-39-33-6468-PM-1.png)

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