hamish247 0 Posted September 8, 2017 I upgraded the firmware on my NVR and i cannot access it since then. It just keeps telling me authentication error. I have tried to download firmware onto a USB and turn it on with that plugged into it but that doesn't work for me either. I am not the best with this stuff but really need my cameras going again. Can anyone please help me Share this post Link to post Share on other sites
peter chen 0 Posted September 11, 2017 I think it is better to contact with AVTECH for tech suport, or you can check AVTECH web. Peter Share this post Link to post Share on other sites
