PDF schematic, 4.78 MB, for the Compal LA-B843P laptop mainboard; the name gives no laptop brand or revision. Compal uses the LA-xxxxP pattern for boards it manufactures for various notebook brands. The diagram helps trace the power path from the charger input through the charging IC to the CPU and memory rails, check enable and power-good signals and identify components near a fault. Confirm the board number and revision on the PCB match the schematic's title page before using its values.
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 @oficinacomputadores. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.