Embedded controller firmware labelled Z8AD for an ITE IT8987E EC chip, in a 128 KB binary; the name calls it BIOS but the size and chip point to the EC image. The EC controls power sequencing, battery charging, keyboard and fans, so a corrupted image can cause no power or charging faults. Reflash it to the EC flash or the IT8987E internal memory with a suitable programmer. Z8AD looks like a board code; verify it against the PCB marking and back up the existing EC contents first.
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 @lappysan. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →