RAR archive of 47.9 KB for motherboard 08627-1, a number fitting the Wistron numbering scheme. No laptop brand, model or content type is stated; the size points to boardview data rather than a schematic. Unpack and identify the file, then open it with OpenBoardView, FlexBV or similar to locate components and test points when diagnosing shorts or missing rails. Confirm the PCB reads 08627-1, since the SA variant with the same base number is a different board.
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 @cyberlanelectonik. 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)