Boardview for the Dell Inspiron 3493 built on Compal board LA-J091P, revision 1.0, provided as a zipped .pcb file. Opening it in a viewer such as OpenBoardView, FlexBV or Boardviewer shows component placement, part designators and net connections on both sides of the PCB. Technicians use it to find test points, trace a rail back to its source and locate shorted capacitors. Compare the LA-J091P marking and revision on the board with this file, since layouts 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 @L9BCM2MdAgNjNDk1. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.