Boardview for a laptop mainboard numbered DAH98MMB8D0, packed as a zip of about 329 KB with a CAD-format layout inside. The DA...MB...0 pattern is Quanta's board numbering, so the laptop brand itself is not stated in the name. A boardview lets you locate components, follow nets between parts and find test points when hunting a short or a missing rail. Open the extracted file in a viewer such as OpenBoardView or FlexBV, and confirm the number and revision silkscreened on the PCB match before trusting 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 @vinafix_bios. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.