ds-7616ni-k2

hello, i have 4 NVR ds-7616ni-k2 i just updated 1 for version v4.72 all worked fine in the 1 nvr the update good, but when i tryed to update the sec nvr (same as the first NVR ds-7616ni-k2) i get all installd but after he power on i get in the open window for "username" wrote in "gibberish" when...

Hi, First of all a hello to everyone since this is my first post on this forum. I have tried to search for an answer to my problem without result from various searchengines and forums like this without any success. My Hikvision gear: A Couple of NVR DS-7616NI-K2 and NVR DS-7608NI-K2 with...