Hi every one, I upgraded my hikvision NVR DS-7616NI-E2 /16P with a US firmware and now all the cameras wont connect so I upgraded again with a lower firmware same US firmware and the NVR wont bootup, light and Fan working but that beep sound at first bootup does not sound anymore. I believe my Hikvision is the Graymarket version. I say that because after upgrading with US firmware and run into this problems. any ways to get it back. ........ I am using a straight cat6 cable gave my pc 18.104.22.168 but cant reach 22.214.171.124 when i ping. please i need your experience to fix this thank you .