You likely have a semi-brick. Try the emergency recovery:
While not a formal academic paper, the and DD-WRT development logs serve as living documentation for this device. dlink dsl2750u h w ver j1 firmware updated
Save your current configuration by navigating to Maintenance > System (or similar) so you can restore your ISP settings if they are wiped during the update. 3. Access the Admin Interface How to update your D-link router (DSL 2750) - step by step You likely have a semi-brick
hardware J1, follow these steps derived from D-Link technical support documentation : Firmware's - D-Link dlink dsl2750u h w ver j1 firmware updated
Go to (sometimes called Software Update or Upgrade Firmware ).