Quanta U8C motherboard files, board number DA0U8CMB6B0, revision 1A, contained in a 638 KB RAR archive with no laptop model given. The number follows Quanta convention: DA0, the U8C project code, MB for main board and a build suffix. Inside is most likely a schematic for tracing the DC-in path, charger, standby rails and CPU regulators and for locating parts near a short. Extract it with 7-Zip or WinRAR and open the pages in a PDF reader. Verify the silkscreened number exactly, as neighbouring codes like U83 are different designs.
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 @IT_SERVICE_WORLD. 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.