Lenovo boardview labelled LT41 for Wistron board 14217-1M, with 03N03 also noted in the name. The 239 KB BRD layout can be opened in OpenBoardView, FlexBV and similar tools to find parts, pads and net connections. The five-digit dash numbering is the Wistron ODM pattern used for many Lenovo models. Pair it with a schematic to probe test points and trace shorted rails, and check that the number on the PCB matches 14217-1M before relying on component 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 @boardviews. 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.