Circuit diagram for the Compal LA-B843P laptop mainboard, supplied as a 4.10 MB PDF. Nothing beyond the board code appears in the name, so no model, brand or revision is given. Compal, a major notebook ODM, labels its boards with this LA-number scheme, and one board often ships under different brand names. Open it in any PDF reader to follow the power sequence, locate the charger and VRM circuits and identify net names. Check the number and revision printed on your board first.
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 @cyberlanelectonik. 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.