Quanta ZRX laptop board files at revision 1A, stored as an 812 KB RAR archive. Neither the laptop brand nor the model is named, so confirm the ZRX code and revision on the PCB. Quanta acts as an ODM for many notebook brands, which is why its board codes differ from retail model names. A schematic is the most likely content, letting a technician follow power rails, read the power-on sequence, locate components and find measurement points when chasing shorts.
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.
7-ZipWinRARThe Unarchiver (macOS)