Updating the firmware on an H.264 DVR may fix problems such as the DVR not recording, cameras not working or freezing, cameras showing black or disappearing, WiFi not working, not connecting to the phone, DVR rebooting for no reason, no playback, etc.Ĭheck the list below and download the right firmware for your DVR. These chipsets are found on AHD DVR, 5MP DVR, 1080P DVR, 4MP DVR, 960H DVR, TVI H.264 DVR, 4MP NVR, hybrids, etc. HiSilicon manufactures an array of chipsets used on generic H.264 DVRs or H.265 NVRs that are sold under various brand names. In this list, we’ve included the firmware for H.264 DVRs and H.265 NVRs that are based on HiSilicon chipset such as Hi3520A, Hi3520D, Hi3521, Hi3521A, Hi3531, Hi3531A, Hi3535, Hi3536.