Boardview for the Compal LA-M721P motherboard, project code IH4ST, revision 1.0, in a compact 339 KB RAR archive. Compal is a large laptop ODM whose LA-prefixed board numbers show up under several notebook brands, and the name does not say which retail model this board went into. Open the extracted layout in a boardview viewer to find components, highlight nets and pick test points while tracing rails or diagnosing shorts. Confirm that the LA-M721P code and the revision on the PCB match the file.
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 @BoardSchematic. 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.