- Networks
- Fibre routers
FIBRA-APAGADO
MásMóvil FIBRA-APAGADO on Livebox 6s ZTE: not registered yet
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Medium
Quick answer
On MásMóvil's Livebox 6s (ZTE ZXHN F6640P), the Fibra light off means the router is still booting, has not started registration, or needs the Internet password (ONT password) saved at http://192.168.1.1. Check Alarma and enter the ONT password.
Safety first
Stop and check this first
- Do not confuse the Internet password (ONT password, sent by SMS, email or letter) with the Wi-Fi password printed on the rear label of the Livebox 6s.
- Pressing the bottom Reset pinhole with a pin for 1 second reboots the ZXHN F6640P without losing settings, whereas holding it for more than 5 seconds restores factory defaults.
- Never look directly into the optical port to avoid eye injury, and do not open the casing or extend the 12V-2A power adapter cord.
Safe checks you can perform
- Wait 3 minutes after power-on and check the Power and Alarma LEDs
- Enter the Internet password (ONT password) at http://192.168.1.1
- Restart the router and run self-diagnosis in Yo soy Más
Leave these tasks to a qualified professional
- Do not attempt this professional task: ONT password lookup and registration check with MásMóvil
- Do not attempt this professional task: On-site visit by a MásMóvil technician
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
ONT password lookup and registration check with MásMóvil
What they doMásMóvil customer support provides the Internet password (ONT password) for your line if you have not received it and checks why the Livebox 6s is not starting GPON registration.
They must show youconfirmation of the ONT password linked to your line and the router's registration state on the OLT.
In writingthe incident ticket number, the optical registration diagnosis and the steps taken.
On-site visit by a MásMóvil technician
What they doIf the fibre cable is properly connected and the Livebox 6s still fails to register with the correct ONT password, a MásMóvil technician tests the optical socket, patch lead and router at home.
They must show youthe optical power reading at the wall socket and the Fibra and Internet LEDs lit solid green.
In writingthe technician visit report confirming whether the fault lies on the operator side and whether the Livebox 6s is replaced.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Wait 3 minutes after power-on and check the Power and Alarma LEDs
- Who:
- you.
- How:
- make sure the Power LED is solid green and wait 3 minutes after switching on; then check whether the Alarma LED stays off or blinks fast red.
- Result that matters:
- telling normal optical signal reception apart from a disconnected fibre lead.
- If Power is solid green and Alarma is off:
- optical power is fine and the router is waiting for the ONT password.
- If Alarma blinks red:
- without looking into the optical port, check that the green fibre connector is firmly seated in the Livebox and the wall socket.
- Evidence to keep:
- photo of the Livebox 6s front panel showing Power, Fibra, Alarma and Internet.
Evidence: Información básica del router Livebox 6s · ZXHN F6640P GPON ONT Manual de Usuario (Guía de instalación Livebox 6s ZTE)
Enter the Internet password (ONT password) at http://192.168.1.1
- Who:
- you.
- How:
- connect a smartphone (with mobile data turned off first) or PC to the Livebox 6s, open http://192.168.1.1 or http://livebox, enter the Internet password (ONT password, different from the Wi-Fi key) sent by MásMóvil and click Guardar.
- Result that matters:
- the Fibra LED starting to blink green and turning solid green within 1 minute along with Internet.
- If Fibra and Internet turn solid green:
- your Internet connection is active.
- If you do not have the ONT password or Fibra does not turn solid green after saving:
- continue to the next check.
- Evidence to keep:
- screenshot of the 192.168.1.1 setup screen before clicking Guardar.
Evidence: Información básica del router Livebox 6s · ZXHN F6640P GPON ONT Manual de Usuario (Guía de instalación Livebox 6s ZTE)
Restart the router and run self-diagnosis in Yo soy Más
- Who:
- you.
- How:
- switch the router off and on with the red On/Off button (or press Reset for 1 second with a pin to reboot without losing settings); if it still fails, open Yo soy Más, Cuenta, Ayuda, Comprobar estado.
- Result that matters:
- clearing any temporary lock and checking your line status with MásMóvil.
- If after restarting you can save the ONT password and Fibra turns solid green:
- service is restored.
- If the Fibra LED stays off or you need your ONT password:
- contact MásMóvil customer service.
- Evidence to keep:
- screenshot of the Yo soy Más self-diagnosis result and time of the restart.
Evidence: Información básica del router Livebox 6s · No funciona Internet en casa · ZXHN F6640P GPON ONT Manual de Usuario (Guía de instalación Livebox 6s ZTE)
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Networks
- Brand
- MásMóvil
- Product type
- Fibre routers
Known code variants
- Livebox 6s ZTE Fibra LED off
- Livebox 6s ZTE LED fibra apagado
- MásMóvil fibra apagada configurar clave de internet
- MasMovil Livebox 6s fibre light off
- MásMóvil Livebox 6s luz fibra apagada
- MasMovil router no fibre light
- router MásMóvil sin luz de fibra
- ZXHN F6640P fibre light off ONT password
- ZXHN F6640P luz fibra apagada ONT password
What it means
On MásMóvil's official Livebox 6s (ZTE) support page and in its ZXHN F6640P user manual (in Spanish; other MásMóvil routers may differ), an unlit Fibra LED means the device is starting up, the fibre is not connected, or the unit has not started the GPON registration process. In the ZXHN F6640P setup and troubleshooting guide, MásMóvil explains that after the initial 3-minute boot, the Fibra LED stays off until you sign in at http://192.168.1.1 and save your Internet password (ONT password). An unlit Fibra light alone never proves the router is faulty.
Warnings and stop conditions
- Loweditorial warning
Do not confuse the Internet password (ONT password, sent by SMS, email or letter) with the Wi-Fi password printed on the rear label of the Livebox 6s.
Evidence: Información básica del router Livebox 6s · ZXHN F6640P GPON ONT Manual de Usuario (Guía de instalación Livebox 6s ZTE)
- Mediumeditorial warning
Pressing the bottom Reset pinhole with a pin for 1 second reboots the ZXHN F6640P without losing settings, whereas holding it for more than 5 seconds restores factory defaults.
Evidence: Información básica del router Livebox 6s · ZXHN F6640P GPON ONT Manual de Usuario (Guía de instalación Livebox 6s ZTE)
- Higheditorial warning
Never look directly into the optical port to avoid eye injury, and do not open the casing or extend the 12V-2A power adapter cord.
Evidence: ZXHN F6640P GPON ONT Manual de Usuario (Guía de instalación Livebox 6s ZTE)
Symptoms and causes
Probable causes · in order
- Internet password (ONT password) not saved yet at 192.168.1.1Common
The ZXHN F6640P installation guide states that when the Fibra LED is off and Alarma is not blinking red, you must open http://192.168.1.1 and save the ONT password sent by SMS, email or letter.
Evidence: ZXHN F6640P GPON ONT Manual de Usuario (Guía de instalación Livebox 6s ZTE)
- Router still within its initial 3-minute startup periodPossible
MásMóvil documents that after pressing the Power button, the router takes about 3 minutes to boot until Power is solid green while Fibra and Alarma remain off.
Evidence: Información básica del router Livebox 6s · ZXHN F6640P GPON ONT Manual de Usuario (Guía de instalación Livebox 6s ZTE)
- Fibre cable unplugged at the green port or optical wall socketPossible
MásMóvil's light table also links an unlit Fibra LED to disconnected fibre; if optical signal is missing after 3 minutes, the Alarma LED blinks fast red.
Evidence: Información básica del router Livebox 6s · ZXHN F6640P GPON ONT Manual de Usuario (Guía de instalación Livebox 6s ZTE)
Virtual technician
Does FIBRA-APAGADO still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Información básica del router Livebox 6s
MASMOVIL · 2026 · official_doc
- 2
MASMOVIL · 2026 · official_doc
- 3
ZXHN F6640P GPON ONT Manual de Usuario (Guía de instalación Livebox 6s ZTE)
MASMOVIL · 2025 · manual
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