tftp update - econt_Vision-AV2000 error (7716 NVR)

[Nmagriplis]

Hi guys, pleasure to meet you all. I recently tried to log into my ds-7604ni-k1/4p after a power cycle but I am unable to enter a username & password does not work. Is there a way I can log into my nvr again? Thank you

Update: Thank you for your help, your guidance has resolved the issue for me on the above-mentioned NVR