Toshiba Satellite repair archive in RAR format, 1.10 MB, labelled only with the MA20 token. The name does not state the exact Satellite model, board maker or what is inside, so open it and check the title block of the drawings before use. MA20 is probably a board or project code; compare it with the markings on the motherboard to confirm a match. Schematic packs of this kind serve for tracing supply rails, locating MOSFETs and controllers, and following signals when diagnosing a no-power or no-display fault.
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.