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Skip to content : If the device still boots, navigate to [System info] > [Version] to find your current firmware string.
: Ensure the download matches the Hi3520D SoC, as firmware is often specific to the processor and channel count (4, 8, or 16-channel). Download AHB700XT8 3520D rar
: For broader compatibility, this Firmware Download Guide provides a list of V4.02.R11 firmware for Hisilicon SoC-based DVRs (including the Hi3520D chipset used in your model). How to Identify the Correct Version : If the device still boots, navigate to
Flashing an EEPROM dump typically requires a hardware programmer (like a CH341A) to write the data directly to the chip if the DVR is completely unresponsive. : If the device still boots
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