Boardview archive identified only as 10240-SA, about 70.8 KB in RAR form, with no brand or device named. The five-digit dash pattern resembles Wistron board numbering, but the name alone does not confirm the maker or model. Open the extracted file in a viewer such as OpenBoardView or FlexBV to identify parts and nets, then compare the layout and markings with your PCB. Make sure the board number printed on the board matches before using it for tracing rails or locating test points.
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 @schematicslaptop. 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.