Boardview for the N61B motherboard, marked MB-E in the name, packed in a 317 KB RAR archive. The BDV tag indicates layout data rather than a circuit diagram, letting a technician see part positions, pin nets and connected components when probing for shorts or missing voltages. Extract the archive and load the file in a boardview program such as OpenBoardView or FlexBV. Pairing it with the matching schematic speeds up fault finding. Check that the PCB markings correspond to the N61B MB-E designation before relying on placements.
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 @cyberlanelectonik. 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.