Dell Latitude 5450 archive related to the 14th-generation Intel version, with a trailing 12 in the name whose meaning is unclear. No board number appears, so extract the RAR and inspect the files to learn whether they are a schematic, boardview or firmware and which motherboard they serve. Such data helps trace rails and locate faults. Compare the board identifier on the PCB first, and back up any SPI flash before writing an image to it.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @ShareMan_Electronic_Files. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)