Boardview for board NS-C221 in the .tvw format, roughly 208 KB in size. Only the board code is given; the NS prefix belongs to the LCFC numbering used on Lenovo sub-boards, so the exact laptop model needs to be confirmed from the PCB or service parts list. Loaded into a TVW viewer, it reveals component positions, pin-to-net relationships and connector pinouts. That helps when tracing a fault from a daughterboard back to the main board, testing continuity or finding a shorted part. Check the revision on the board too.
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 @pepeelectronica. Enginerys does not host this file.
How to open a .tvw file
Binary boardview from Tebo-ICT test software, frequent for Gigabyte, MSI and many newer laptop boards.