Boardview covering the NL50RU and NL53RU platform with board code 6-71-NL5R0-D02, in a 3.91 MB RAR. The 6-71 prefix with a D-suffix revision follows Clevo's board-numbering style, and these barebones are sold under many reseller brands. Confirm the code and the D02 revision printed on the PCB match. The layout shows component positions and net connectivity, which you need for tracing rails, isolating shorts and finding test points. Open the extracted contents in FlexBV, OpenBoardView or a similar boardview viewer.
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 @BoardSchematic. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.