Never interrupt the power during a flash process; a surge protector is highly recommended.
Search for "Hi3250 16Mb full dump" on sites like Scribd or GitHub, as technicians sometimes share PDF guides containing external download links. ⚡ How to Flash the DVR Download FLASH DUMP DVR KNG 5104 Hi3250 16Mb rar
You can typically find this firmware on specialized CCTV technician portals and repository sites. Never interrupt the power during a flash process;
You will likely need a CH341A USB Programmer and a SOIC8 clip or a soldering station to remove the chip. You will likely need a CH341A USB Programmer
Flashing a 16MB dump usually requires an external programmer rather than a USB stick, especially if the DVR won't boot.
If your device is branded under a larger manufacturer (like Dahua or Hikvision), check the Dahua Support Center or Hikvision Download Portal for official firmware updates, though these are "updates" rather than full "dumps."