Small RAR archive, 192 KB, labelled P5QPL-AM, a micro-ATX desktop motherboard model following ASUS naming. The name offers no indication of whether a boardview, schematic or BIOS is enclosed, so inspect the contents after extraction. A board file would open in OpenBoardView or a comparable viewer for finding components, test points and net connections while diagnosing no-power or short faults. Make sure the model and revision silkscreened on your board agree with the files inside before trusting any measurements.
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 @boardview. 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.