Boardview for a board marked U8C-MB-B, supplied in a 278 KB RAR archive. The name gives no brand, laptop model or file format, so open the archive to see which viewer is required; most layouts load in OpenBoardView or FlexBV. A boardview lets you find components by designator, follow nets and locate test points when hunting a short or a missing voltage. Make sure the code printed on your PCB matches U8C-MB-B, including the revision letter.
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.
7-ZipWinRARThe Unarchiver (macOS)