Boardview in CAD format, zipped, for a board identified as NB8513 MB V3, meaning mainboard revision 3. The name does not specify the laptop brand or model. A .cad boardview shows part outlines, pin nets and connections, letting a technician locate components, test points and follow nets without a schematic. It opens in programs such as OpenBoardView, FlexBV or BoardViewer. Compare the board number and revision printed on the PCB with V3 before relying on the component layout.
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.
Built-in OS tools7-Zip