H87M-PRO motherboard archive in RAR format, about 395 KB, for a micro-ATX board based on the Intel H87 chipset. The name carries no board revision and does not say whether the contents are a boardview, a schematic or a BIOS image, though the small size points to documentation. Once unpacked, a boardview viewer such as OpenBoardView or FlexBV can show part placement, nets and test points for diagnosing no-power faults or shorted rails. Check that the revision on the PCB matches before trusting pin-outs.
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.