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Hi I have the same problem with my NVR . What program I need to use and how connect TTL cable .

Ok so where I need connect the ttl adaptor on nvr main board . And I need any program ?

Hi I just make better picture .

Hi my main board number is ds-80242 Where can I find the 4-pin connector on the main board.

Hi device have new software but status is the problem with connection to the TV by HDMI port and VGA port is black screen when nvr is power on is one beep sometimes black screen but sometimes start screen is freeze up and I can't du anything . The system can't boot properly everything freez up .

Hi somebody now how flash bios on this nvr ds-7616ni-k2/16p please.

Hi did you fix the dvr?

Hello, I have a problem with my NVR. DS-7604NI-E1/4P when the software is update was turned off the energy in my house and the update was not completed. After restarting nvr is a black screen no menu. So how can I fix this problem . Thank you. Bart .