Compressed RAR package of 1.49 MB named LA46-DIS, with no brand given. The DIS suffix commonly marks a discrete-graphics board variant as opposed to UMA integrated graphics, though the name alone does not confirm the device or the file type inside. Archives of this kind typically hold a laptop schematic in PDF form. A technician would use it to follow power sequencing, find test points and trace a shorted rail. Confirm that the board number printed on the PCB matches before taking voltages or part values from 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 @IT_SERVICE_WORLD. 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.