RAR archive with the PDF schematic of the LG R490 laptop, built on Quanta board QL2, number DA0QL2MB8F0, revision 1A; the packed size is 1.38 MB and this is copy two. Extract it with a RAR-capable archiver first. The DA, project code and MB format is Quanta's standard PCB numbering, and Quanta manufactured many LG notebooks. The drawings support tracing power rails, locating components and test points and isolating shorts. Confirm the board number and revision on the PCB match before working 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 @abgm_manutencao_esquemas. 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.