Acer Aspire E5-471 repair archive, a zip of 3.32 MB. The title gives only the model, with no motherboard code, revision or note on whether it holds diagrams, layout data or a BIOS dump, so unpack it and identify each file first. For schematics, a PDF reader is enough to follow power rails and signals. Boardview files need a dedicated viewer, and binary dumps are written to the SPI flash with a programmer. In every case the board number on the PCB should agree with the documentation before you trust 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 @laptopbios21. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.