Try downloading the firmware file again. Ensure you have the J1 file.
If the router is stuck with flashing lights, it may need a factory reset. Find the small "Reset" button on the back, hold it down for 10 seconds while the device is powered on, then release it.
Click on or Router Update from the left-hand navigation pane.
Given that the last known firmware for the J1 hardware is me_1.00 (from 2017), which is well below the affected version numbers, it is highly probable that your J1 router contains unpatched security flaws. D-Link has officially listed the DSL-2750U as and End-of-Service (EOS) . This means D-Link no longer provides firmware updates, security patches, or technical support for this model.
The best use of a DSL-2750u J1 today is OpenWrt + Repeater mode . Use it to give Wi-Fi to a shed or garage. As a primary modem, it is E-waste. As a secondary tool, it is gold.
The firmware of the D-Link DSL-2750U H/W Ver. J1 model brings several key features and enhancements to the device. These include:
The D-Link DSL-2750U (hardware version J1) is a legacy ADSL2+ N300 modem router . Because it is no longer receiving active feature updates from the manufacturer, maximizing its utility relies on leveraging its native Advanced Web Interface or flashing open-source firmware like OpenWrt (if the specific chipset allows it).
If you need help tracking down the exact download link, let me know: Your (e.g., ME_1.00) The country/region where you bought the router The specific issue you are trying to fix with this update
Navigate to -> Layer2 Interface -> ETH Interface .
Solution: Re-verify the sticker on your router and redownload the file.
Multiple vulnerabilities have been documented for the DSL-2750U series that directly impact firmware versions earlier than 2021/2022. If your J1 device is running older firmware, it may be susceptible to the following:
Log back into 192.168.1.1 and restore your saved configuration file, or manually input your ISP credentials to get back online. Troubleshooting Common Installation Issues