Boardview for the Wistron platform code-named San Bernardino, board number 16561, packed in a 3.58 MB rar archive. The name gives no laptop brand or revision, so confirm the 16561 marking and any revision text on the PCB before relying on the layout. Wistron uses five-digit project numbers like this one. Once extracted, the file opens in a boardview viewer such as OpenBoardView, FlexBV or Boardviewer, where you can search nets, locate parts and test points, and follow power rails while chasing a short.
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 @BoardSchematic. 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.