Toshiba M100 service archive in RAR format, about 1.9 MB, labelled with board number LA-3142. This is a Compal numbering pattern, and the M100 is listed under more than one LA board in circulation, so checking the code on your PCB matters here. The contents are not given in the name, but expect schematic pages useful for following power rails, finding test points, and isolating shorts on the motherboard. Open the extracted PDF in any document viewer and match the revision first.
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 @alischematics. 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.