Boardview for Compal laptop board LA-M366P, revision 1.0, stored in a 3.35 MB rar archive. The name does not say which brand or model uses this board, so match the LA-M366P code and revision printed on the PCB before relying on the layout. Compal builds mainboards for many brands under LA-xxxxP numbers. A boardview viewer such as OpenBoardView or FlexBV shows component placement and nets, letting you find test points, follow power rails and track down a shorted part.
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.