Acer Aspire E1-431 archive in zip format, about 2.8 MB, with no board number, revision or content details given in the name. Open it to determine whether it contains a BIOS dump, a schematic or other service files for this model. If firmware is inside, it is flashed onto the SPI chip with a hardware programmer to recover a non-booting laptop; a schematic would help with tracing power rails and signals. Match the PCB board number first and always read and keep the original flash contents.
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.