James-T 0 Posted November 20, 2017 Hi I have a Zxtech 4 ch NVR which failed a firmware update and is now bricked. (The first 2 updates were great). It has power and I can connect to it directly via a PC (not via the router) and it has an IP address (not on the router) - is there a way to install the previous firmware? The circuit board says NVR3520D-V1.1 and it looks remarkably similar to the Hikvision version. Any ideas!? Thanks Share this post Link to post Share on other sites