Sometimes, several LEDs flash

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The FRITZ!Box will occasionally restart. In this case it will cause all or a few LEDs to blink constantly. It will restart a few times per week, a few times throughout the day, or when certain activities or events occur, such as but not continuously.

It is important to note:If your FRITZ! Box restarts repeatedly, you must follow the instructions in this article..

Note: All instructions for the configuration and settings in this document are based on the most recent FRITZ!OS for the FRITZ!Box.

Follow the steps below. After each step, verify whether the issue has been resolved.

1. Installing the latest FRITZ!OS

  1. Install the most recent FRITZ!OS on the FRITZ!Box.

2. Make sure you have the proper power supply unit

One of the main reasons for error is using an incorrect power adapter that is not suitable for the FRITZ!Box.

  1. Make sure you use an appropriate charger to connect your FRITZ!Box.

3. Checking the cabling

If you’re using the FRITZ!Box with an IP-based line that is not connected to an analog conventional or ISDN landline, don’t connect the cable at the the Y-shaped cable to connect to a landline. In the event of interference, it is sent to the FRITZ!Box

  1. Make sure that the black end of the cable with the Y shape is hooked up to somewhere. If it is, disconnect the cable.

4 Test to determine if a USB device interferes with the USB device

The issue could be caused by an USB device that is connected to the FRITZ!Box

  1. Take out every USB device from your FRITZ!Box. If the issue no longer is observed, it could be that the USB device or the cable it connects to is damaged or the device uses excessive energy.
  2. Connect your USB devices with the FRITZ!Box one at a time one, to determine what device is the culprit.
  3. For testing , you should make use of an USB hub that has its own power source (active USB hub) to connect the device that causes disturbance to FRITZ!Box.
  4. If the issue occurs when you use it with an active hub you should replace it with a new USB device.

5 Configuring the file sharing software

The steps below are needed if you’re using files sharing programs (such such as eMule, BitTorrent):

  1. In the software for file sharing limit the number of concurrent connections you can make.

6 Examining the FRITZ!Box settings and FRITZ!

The factory settings are loaded

  1. Set the FRITZ!Box’s default settings.

Verifying the settings

  1. Modify the functions that are basic to the FRITZ!Box.
  2. Verify if the issue persists.
  3. If the problem is no is occurring, totally modify the FRITZ!Box. The settings of the FRITZ!Box were not correct.
    • If the issue continues to occur If the problem persists, you can use your Recovery program that will reset your FRITZ!Box. It appears that the FRITZ!Box appears to be in an error condition.

If it continues to restart it is because of an automatic safeguard mechanism to protect the FRITZ!Box against errors caused by overload, such as. The automatic restart returns the FRITZ!Box’s functionality.