Compressed RAR of about 1.62 MB labelled L80V with revision R2.1, likely a schematic package for a board or project of that name. No brand or ODM is given, and the archive contents are not described, so verify what is inside after extraction. The revision tag is important: compare it with the revision printed on your PCB, since component placement and values can change between revisions. Use the material to trace power rails, follow signals and identify parts while diagnosing no-power or short faults.
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 @alischematics. 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.