: DS80249 P Rev 12
(commonly used in Hikvision DVRs/NVRs) are typically not publicly hosted on official manufacturer websites. These technical diagrams are usually restricted to authorized service centers. ds80249 p rev 12 schematic link
: If you are troubleshooting a "no power" or "stuck on logo" issue, firmware dumps for various revisions (including 2.1) are available on YouTube and specialized technician forums. : DS80249 P Rev 12 (commonly used in