Purpose
The Verifone UX410 indicator lights can be used to detect issues with the device or connected network. Following is a list of the indicator lights and what they may mean.
Indicator Lights
| LED 1 | LED 2 | LED 3 | LED 4 | Description |
| Blinking | On | On | On | No network |
| Off | Blinking | On | On | No connection with the payments platform |
| Off | Off | Blinking | On | Not boarded |
| Off | Off | Off | Blinking Slowly | Ready |
Sales Lights
| LED 1 | LED 2 | LED 3 | LED 4 | Description |
| On | Off | Off | Off | The terminal has received a payment request and is ready for the shopper to tap their card or phone to the NFC reader. The CTLS logo also lights up. |
| On | On | On | On | The shopper has tapped their card or phone and the NFC reader has read the card details. The buzzer also sounds. |
Errors
| LED 1 | LED 2 | LED 3 | LED 4 | Description |
| Off | Off | On | On | The terminal has failed to load its keys and needs to be replaced. |
| Red | - | - | - | The LED 1 light in red indicates a warning. The terminal may have been tampered with. Stop using the terminal and contact the processor immediately. |