Boardview for board BM5070 in TVW format, packed in a ZIP archive. TVW files are opened with Teboview and compatible viewers, which show component placement, part numbers and net connections for both sides of the PCB. Technicians use this to find test points, follow a rail to its source and narrow down shorted components quickly. Other entries link this board code to a Lenovo Legion S7 AMD model, but check the code printed on your PCB before relying on the layout.
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 @vinafix_bios. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip