H820 - LED Light Information
This article describes the LED indicators on the H820 router — what each LED represents, the expected sequence on power-up, and how to interpret the signal strength indicator.
Power-up sequence
When the router is powered on, the following LED sequence indicates a normal boot:
- WAN and LAN LEDs turn on briefly, then turn off
- LAN LED turns on and flickers (boot activity)
- SYS LED turns on solid for approximately 25 seconds, then begins flashing steadily
- Wi-Fi LED turns on — the router has finished booting
The same sequence occurs after a factory reset. If the sequence differs significantly from the above, this may indicate a hardware or firmware fault.
For factory reset instructions, see Restore Router to Default Factory Settings.
LED reference
| LED | Colour | State | Meaning |
|---|---|---|---|
| SYS | — | Solid for ~25 seconds | Booting — normal on power-up |
| SYS | Green | Flashing | System running normally |
| SYS | — | Off or remains solid after 25 s | System fault |
| LAN | Green | Solid | Ethernet link connected |
| LAN | Green | Flashing | Data transmitting on LAN |
| LAN | — | Off | No LAN cable connected |
| VPN | Green | Solid | IPSec VPN tunnel active |
| VPN | — | Off | VPN inactive or not configured |
| CELL | Orange | Flashing | SIM registered but no internet connection — check APN settings |
| CELL | Orange | Solid | Internet connection established |
| WiFi | Green | Solid | Wi-Fi enabled |
| WiFi | — | Off | Wi-Fi disabled |
| WAN | Green | Solid | WAN Ethernet connected |
| WAN | Green | Flashing | Data transmitting on WAN |
| WAN | — | Off | No WAN cable connected |
| Signal | — | Off | No signal, or signal check not yet ready |
| Signal | Blue | Slow flash (2 s on / 2 s off) | Weak signal — 1 bar |
| Signal | Blue | Medium flash (1 s on / 1 s off) | Moderate signal — 2 bars |
| Signal | Blue | Fast flash (0.5 s on / 0.5 s off) | Strong signal — 3 bars |
The Signal LED indicates signal strength independently of the CELL LED. Signal flashing blue means the modem can see the network. CELL solid means a data connection is established. If all LEDs are solid and unchanging, this usually indicates a system error — perform a factory reset. For detailed signal metrics (RSRP, RSRQ, SINR), check Status > Mobile in the WebUI.