Boardview in BRD format for motherboard 17863-1, marked MB, a 244 KB file following the Wistron five-digit numbering pattern, used in boards for Dell, Acer and other brands. No laptop model is named, so identify the machine by the number printed on the PCB. Open it with a boardview viewer such as OpenBoardView, FlexBV or Boardviewer to locate components, test points and nets while checking shorts or missing voltages. Match the board number and revision before trusting pin locations.
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 .brd file
The most common boardview extension. Several unrelated formats share it, which is why one viewer opens a .brd and another refuses it.