TD-W8961N V4 - Settings Reset After Power Cycle & Infinite Reboot Loop

Model: TD-W8961N (EU)

Hardware Version: V4

Firmware Version: 3.2.0 Build 210914 Rel.24052 (Latest)

The Problem

I am experiencing a critical issue where my modem loses all configuration settings every time it is powered off or if there is a power outage. Instead of reconnecting, the device requires a full factory reset and manual reconfiguration to access the internet again.

Detailed Symptoms

Whenever the power is cycled, the modem enters a specific reboot loop:

1. DSL LED turns on (syncing).

2. WAN and LAN LEDs suddenly shut off.

3. The DSL LED turns off immediately after.

4. The sequence repeats indefinitely until a manual factory reset is performed.

Troubleshooting Already Performed

• Isolation Test: I tested my older modem on the same line; it connects instantly and retains settings without any issues. This confirms the problem is specific to the TD-W8961N V4 unit.

• Consistency: This happens every single time the power is cut.

Request

Is there a firmware update specifically addressing NVRAM (memory) retention for the V4 hardware? Or is this a known hardware defect requiring an RMA?

Any advice or official firmware links would be greatly appreciated.