@wg20032003 The FRITZ!Box stores the active boot partition in a variable called linux_fs_start (with a value of either 0 or 1). Sometimes, the recovery tool flashes the working system onto one partition, but the router keeps trying to boot from the corrupted one.
As you can access the bootloader, you can manually switch the active partition using an FTP client:
- Set a static IP address on your PC: IP: 192.168.178.2, Subnet Mask: 255.255.255.0, Gateway: 192.168.178.1.
- Unplug the router’s power cable.
- Open Command Prompt (CMD) on your PC, type
ftp 192.168.178.1
, but do not press Enter yet.
- Plug the power cable back in and immediately (within the first 2–3 seconds) press Enter in CMD.
- When prompted for credentials, use ‘adam2’ for both the username and password.
- Check the current active partition by typing: quote GETENV linux_fs_start
- If the output is 0, change it to 1 (or vice versa) by typing: quote SETENV linux_fs_start 1 (or 0 if it was 1).
- Type ‘bye’ to exit, then unplug the router from the mains socket for 10 seconds.
Ensure that the “Fritz Restore” tool you used is the official recovery file provided directly by AVM for this specific model.
- Download the official recovery file (FRITZ.Box_5690_Pro-0x.xx-recover.exe) from the official AVM FTP server
- Important: Disable your antivirus software and Windows Firewall completely before running it. These programmes frequently block the UDP broadcasts required to flash the image.
Click:
ftp.avm.de/fritzbox/fritzbox-5690-pro/other/recover/
