BDV boardview covering revision 4.1 of the ASUS K43L motherboard, compressed into a 115 KB RAR. Open it with OpenBoardView, FlexBV or a similar viewer to look up parts by reference, follow nets between components and find measurement points. Technicians use it with the schematic to locate a shorted capacitor or a missing voltage. Because the K43L came in multiple board revisions with different layouts, match the 4.1 marking on the PCB before trusting component positions.
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 @pkbiosbdv. 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.