Archive named only nc6230, most likely the HP Compaq nc6230 business notebook, though the name gives no brand, board number, revision or content type. The package is about 1.12 MB, a size typical of a PDF schematic. Extract it to confirm what it holds, then compare the motherboard code on the PCB with the document before tracing power rails, checking the charger circuit or locating the components on a short to ground.
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.
7-ZipWinRARThe Unarchiver (macOS)