An archive of repair files for Acer hardware (board DA0ZQZMB6C1). Shared as “ACER E1-421 DA0ZQZMB6C1 testada ohg.rar” — a .rar file, 1.48 MB.
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 @Satale_bios_esquemas_Laptop. 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)