Hello, friend!
Because I do not know the changes of HG8040 indicators, you can locate the fault by referring to the meanings of ONT indicators.
Meaning of Indicators on an ONT
| Indicator | Description | Status | Description |
| CATV | CATV port LED | Steady on | The CATV function is enabled and CATV signals are received. |
| Off | The CATV function is disabled or CATV signals are not received. |
| WPS | WPS LED | Steady on | The WPS function is enabled. |
| Blinking | A Wi-Fi terminal is accessing the system. |
| Off | The WPS function is disabled. |
| WLAN | WLAN LED | Steady on | The WLAN function is enabled. |
| Blinking | Data is being transmitted on the WLAN port. |
| Off | The WLAN function is disabled. |
USB | USB port LED | Steady on | The USB port is connected and is working in the host mode, but no data is transmitted. |
| Blinks quickly (twice per second) | Data is being transmitted on the USB port. |
| Off | The USB port is not connected. |
| TEL1–TEL2 | Voice telephone port LED | Steady on | The ONT is registered with the Softswitch but no service flows are transmitted. |
| Blinking | Service flows are transmitted. |
| Off | The ONT is not powered on or fails to be registered to the Softswitch. |
| LAN1–LAN4 | Ethernet port LED | Steady on | The Ethernet connection is in the normal state. |
| Blinking | Data is being transmitted on the Ethernet port. |
| Off | The Ethernet connection is not set up. |
| LOS | Connection LED | See the following table. |
| PON | Authentication LED | See the following table. |
| POWER | Power supply LED | Steady on | The ONT is powered on. |
| Off | The power supply is cut off. |
Meaning of PON and LOS Indicators
| No. | Indicator Status(PON) | Indicator Status(LOS) | Description |
| 1 | Off | Off | The ONT is prohibited by the upper-layer device or blinks abnormally, contact the service provider for help. |
| 2 | Blinks twice a second | Blinks twice a second |
| 3 | Blinks twice a second | Off | The ONT attempts to set up a connection with its upper-layer device. |
| 4 | Steady on | Off | A connection is set up between the PON terminal and its upper-layer device. |
| 5 | Off | Blinks once two seconds | The ONT is not connected to optical fibers or does not receive optical signals. |
| 6 | Blinks once two seconds | Blinks once two seconds | The hardware is faulty. |
I hope it can help you!
Thanks!
