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I have tried to upgrade the firmware of hikvision DVR DS-7108HGHI-E1 through lan wire using lan cable using TFTP and I also used usb to rs 232 cable to connect. All the process was fine and quite every process was monitored on putty, but at the stage 'update check' it gives an error and the...

I cannot change anything on my dvr settings. When it reboots I get the same previous settings(not the factory default). I even cannot change the password it get the same previous password after reboot. I have tried updating the firmware yet it retain the same previous version. I think the flash...