HI, i have DS-2CD2142F-IS with firmware V5.2.5 build 141201. The Serial N. contain "CH" but the interface language is english. I would like to update to a newer firmware version starting from v5.3.0->v5.4.0->... I can't find the firmware v5.3.0 in
DOWNLOAD PORTAL . The update to v.5.3.3 brick the camera so i install v5.2.5 using tftp. Can someone pls help me?