ASUS M5A87 motherboard boardview, revision 1.00, stored in a 99.1 KB RAR archive. A technician uses it to locate parts by reference designator, view all points on a selected net, and find convenient spots for measuring supply voltages or resistance to ground. Extract the archive and open the layout with OpenBoardView, FlexBV or similar viewer software. Confirm the revision printed on the PCB is 1.00 before trusting component locations, as later revisions may differ.
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.