BA50 board revision r20 boardview, packed in a 266 KB RAR archive, with no laptop model stated in the name. Use it to locate components by designator, follow nets across the board and find test pads while diagnosing no-power or no-boot faults. Viewer programs such as OpenBoardView or FlexBV open most boardview formats. Since other BA50 revisions, including r13 and r22, circulate separately, check the revision printed on your PCB and pick the matching file, because part positions may differ between revisions.
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 @schematicslaptop. 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.