GUI from the router Zyxel NBG4615 v2 (p-660HN-F1Z) can no longer be reached normally

My Zyxel router NBG4615 v2 (p-660HN-F1Z) has been in operation for 10 years without any problems. However, the GUI has not been accessible for a few months. After calling the GUI, the following appears:

/usr/lib/lua/luci/i18n.lua:91: attempt to index local 'lang' (a nil value)
stack traceback:
/usr/lib/lua/luci/i18n.lua:91: in function 'setlanguage'
...usr/lib/lua/luci/controller/expert/configuration.lua:106: in function 'v'
/usr/lib/lua/luci/dispatcher.lua:615: in function 'createtree'
/usr/lib/lua/luci/dispatcher.lua:204: in function 'dispatch'
/usr/lib/lua/luci/dispatcher.lua:168: in function </usr/lib/lua/luci/dispatcher.lua:167>

The router still works normally, only the GUI is not accessible. The router can also be pinged:

C:\Windows\System32>ping 192.168.0.1

Ping wird ausgeführt für 192.168.0.1 mit 32 Bytes Daten:
Antwort von 192.168.0.1: Bytes=32 Zeit=1ms TTL=64
Antwort von 192.168.0.1: Bytes=32 Zeit=1ms TTL=64
Antwort von 192.168.0.1: Bytes=32 Zeit=1ms TTL=64
Antwort von 192.168.0.1: Bytes=32 Zeit=1ms TTL=64

Ping-Statistik für 192.168.0.1:
Pakete: Gesendet = 4, Empfangen = 4, Verloren = 0
(0% Verlust)

After extensive research on the internet I came across no indication of what could be the problem.
Can someone help me please?
Thanks in advance

Accepted Solution

  • tonygibbs16
    tonygibbs16 Posts: 831  Guru Member
    First Anniversary 10 Comments Friend Collector First Answer
    Answer ✓

    Hello @klouda

    Welcome to the forum.

    Are you able to say what firmware version is in your NBG4615 v2 please?

    Kind regards,

    Tony

All Replies

  • tonygibbs16
    tonygibbs16 Posts: 831  Guru Member
    First Anniversary 10 Comments Friend Collector First Answer
    Answer ✓

    Hello @klouda

    Welcome to the forum.

    Are you able to say what firmware version is in your NBG4615 v2 please?

    Kind regards,

    Tony

  • klouda
    klouda Posts: 4
    First Comment

    Hello Tony

    Fortunately I have a screenshot from 2013.

    The firmware version: ZyNOS Firmware-Version: 3.70(BJI.4)/03/22/2010.

    But I am not sure if I have updated the firmware in the meantime.

    Thanks.

    King regards

    Klouda

  • tonygibbs16
    tonygibbs16 Posts: 831  Guru Member
    First Anniversary 10 Comments Friend Collector First Answer

    Hello @klouda

    Thanks for your reply.

    NBG4615v2 is end of life by Zyxel, see https://webservice.zyxel.com/eol/ArchivedEOLModel.pdf

    However, there is some firmware and User's Guide available at their Swiss distributor at https://www.studerus.ch/de/support/downloadcenter/ if you put NBG4615 v2 in the search box at the top left.

    The latest firmware for NBG4615 v2 Standard Version is v1.00(AAFI.4)C0 from June 2015.

    I hope that this is helpful.

    Kind regards,

    Tony

  • klouda
    klouda Posts: 4
    First Comment

    Hello Tony

    Thanks for your help.

    I would like to update the firmware but how do i update the firmware if i don't have access to the GUI?

    King regards

    Klouda

  • tonygibbs16
    tonygibbs16 Posts: 831  Guru Member
    First Anniversary 10 Comments Friend Collector First Answer

    Hello @klouda

    I have had that sort of thing happen with another Zyxel home gateway router.

    I found that a power cycle without factory reset got me back into the GUI.

    I hope that this is helpful.

    Kind regards,

    Tony

  • klouda
    klouda Posts: 4
    First Comment

    Hello Tony

    Thank you for this idea. I want try it.

    Kind regards

    Klouda

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