Boardview layout in .brd format for a main board tagged GC8-MB with a D suffix that may indicate a revision or variant, about 252 KB in size. The name does not state the laptop brand or model, so compare the GC8 marking and suffix with the silkscreen on the actual board before trusting pin locations. Technicians open such files in OpenBoardView, FlexBV or similar tools to locate parts, trace a net from a connector to its source, find test pads and measure diode values when chasing shorted rails.
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 @ITHINKHS. 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.