Toshiba Satellite A70 service archive, compressed as RAR at 2.36 MB, marked with board number LA-2301. That code follows Compal numbering, the ODM behind this board. The name does not reveal the contents, but material of this size usually means a full schematic. Open the PDF inside to trace voltage rails, inspect the charger and DC-DC converters, and find components around a shorted rail. Check that the LA code and revision silkscreened on the PCB match the title block before relying on it.
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.