ASUS B150-Plus D3 repair guide in a 1.24 MB RAR file, covering the DDR3 memory variant of the B150-Plus rather than the DDR4 model. Make sure the board on the bench carries the D3 marking, since memory power circuitry differs between versions. Guides of this kind outline the power-on sequence, voltage checkpoints and typical failed parts for no-boot faults. Verify the PCB revision too. Extract with a standard archiver; the document type inside is not given.
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 @ZINFOSERVICECHANNEL1. 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.
7-ZipWinRARThe Unarchiver (macOS)