Boardview for the ASRock B150A-X1 Hyper motherboard, revision 1.01, in a 481 KB ZIP. It is a B150 chipset board from the Intel 100-series desktop line. A technician opens a file like this in a boardview viewer such as OpenBoardView or FlexBV to locate components by designator, follow power and signal nets and find measurement points when diagnosing no-boot, no-power or shorted-rail conditions. Revision 1.01 is stated in the name, so check that the PCB marking agrees before trusting the layout.
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 @zinfo_desktop. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.