FRITZ!Box 6890 LTE Service - Knowledge Base

FRITZ!Box 6890 LTE Service

"Info" LED flashes red or several LEDs flash constantly

The "Info" LED on the FRITZ!Box flashes red or several LEDs on the FRITZ!Box flash constantly. The error occurred after updating FRITZ!OS manually or automatically. You may no longer be able to open the FRITZ!Box user interface and the browser only displays a white page with the error message "firmwarecfg: ERROR Error: opening page ../html/index.html".

Simply proceed as described below. After each measure, check whether the issue persists.

1 Preparations

You must clear the cache of your web browser before performing the following steps:

  1. On the keyboard, simultaneously press "CTRL + Shift + Del" or "CMD + Alt + E" for Safari.
  2. In the new window, click "Clear" or press Enter.

2 Restarting the FRITZ!Box

  • Unplug the FRITZ!Box for 5 seconds.

    Note:The FRITZ!Box settings remain intact. The restart will take about 2 minutes. During this time, you cannot access the FRITZ!Box.

3 Updating manually

Downloading the FRITZ!OS file

  1. Call up ftp://ftp.avm.de/fritzbox/ in your web browser.
  2. Switch to the folder for your FRITZ!Box model, then to the subfolder "other", and then to the folder "fritz.os".

    Note:The complete model name of your FRITZ!Box is displayed in the FRITZ!Box user interface on the "Overview" page and on the underside of the device.

  3. Download the file with the extension ".image" to the computer.

Repeating the update process

  1. Click "System" in the FRITZ!Box user interface.
  2. Click "Update" in the "System" menu.
  3. Click on the "FRITZ!OS file" tab. If the tab is not displayed, enable the Advanced View first.
  4. Click "Save Settings".

    Note:Save your FRITZ!Box settings again under "System > Backup" right after successfully completing the installation. Then you can always restore it to a working configuration.

  5. Click the "Browse..." or "Choose File" button.
  6. Select the FRITZ!OS file that you downloaded (image file).
  7. Click the "Start Update" button.