Once you have your hardware revision, you can find the correct firmware on D-Link's support websites.
This is the most important step. The DSL-2750U has multiple hardware versions (e.g., Rev. C, Rev. J1, Rev. V1), and firmware is between them. download hot dlink dsl2750u firmware
When D-Link removes a legacy device from its support portal, the user is forced to rely on third-party archives (e.g., Generic Driver Sites, Tech Forums, File Sharing Services like Mediafire or Rapidgator). Once you have your hardware revision, you can