RAR archive for Quanta motherboard DAG7AMB38C0, revision C, 7.40 MB in size. Quanta encodes its project code in the DA-prefixed number printed on the PCB, and boards of this style appear in HP, Dell, Acer and other laptops. The name does not list the contents, so unpack to see whether it has a schematic, boardview or both. Use them for tracing power rails and locating components, and confirm the full number including the REV C suffix on your board 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 @ShareMan_Electronic_Files. 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.