Earlier revisions may have undersized TVS diodes that failed during surge testing. Rev 1.2 likely upgraded the clamping voltage or added a fuse.
Understanding the DS-80249-P Rev 1.2 Mainboard: A Repair & Modification Guide ds-80249 -p rev 1.2 schematic
For those interested in the specifics of the DS-80249-P Rev 1.2, obtaining the actual schematic and studying it in detail would provide the most accurate and comprehensive understanding. Whether for professional purposes or hobbyist projects, delving into schematics can offer valuable insights into the world of electronics and circuit design. Earlier revisions may have undersized TVS diodes that
: You can perform a factory default through the maintenance menu to resolve software-based board issues. Hikvision SADP Tool ds-80249 -p rev 1.2 schematic