Boardview in BDV format for the Y23A-MB-B board, revision B, in a 319 KB rar. No laptop brand or model appears in the name. Viewers such as OpenBoardView and FlexBV open BDV files and show component outlines, pin nets and test pads, which speeds up locating parts during power-rail diagnosis or short hunting. Before using it, check that the PCB marking matches Y23A with revision B, because other Y23 variants may differ in layout.
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 @SCHEMATICWORLD. 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)