---
title: The sensor is not working and the LED lights are off
description: Possible cause — no power:
---

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1. [Troubleshooting](https://support.airly.org/airly/troubleshooting)

# The sensor is not working and the LED lights are off

**Possible cause — no power:**

- Make sure the power cable is properly connected to the original power supply, and that the power supply itself is plugged into a working socket (100–230V).
- Check the cable running between the sensor and the power supply. If it looks damaged, frayed, or broken in any way, please get in touch with us at [aupport@airly.org](mailto:aupport@airly.org).
- Confirm that the original power supply is working. You can test this by connecting the sensor to a different USB-A charger — if the LEDs light up in any colour, the issue is most likely a faulty power supply, and only that needs replacing.
- Finally, check whether the fuses protecting the electrical circuit for the socket (100–230V) are switched on (in the **ON** position). This should always be done in line with the local health and safety regulations.

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