Revision 2.0 file set for the ASUS X451CA laptop main board, packed as a 112 KB ZIP. The name does not list contents, and the small size most likely indicates a boardview layout. Such files open in OpenBoardView, FlexBV or similar viewers and show component placement, nets and pin connections across both board sides. Verify the rev 2.0 marking on the PCB before use, as other revisions may differ. Technicians rely on it to locate components, probe test points and trace rails while 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 @ITHINKHS. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.