https://ftp.dlink.ru/pub/ADSL/DSL-2750U/Firmware/ (Replace HwVer with your version, e.g., T1 , T2 )
The D-Link DSL-2750U has multiple hardware revisions (e.g., T1 , T2 , T3 , U1 , B1 , C1 ). Flashing the wrong firmware will brick the router. dsl 2750u firmware