Boardview package for a Dell laptop mainboard numbered 213211-2, supplied as a 722 KB zip archive. The six-digit number with a dash suffix follows the Wistron numbering pattern, so Wistron is the ODM behind the board even though it ships under the Dell brand. After extraction the layout opens in a boardview viewer such as OpenBoardView, FlexBV or Boardviewer, letting you find parts, pads and test points and follow nets while probing. Compare the number silkscreened on the PCB before trusting any location..
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 @cynetitsolution. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.