ZIP archive containing a boardview for the Lenovo LCFC NM-E791 motherboard, revision 1. NM-xxxx codes are LCFC's numbering scheme for Lenovo laptop boards, and the code appears on the PCB silkscreen. The 2.23 MB package lets you search nets, find components and probe test points when diagnosing shorts or missing voltages. Extract it and open the file in FlexBV, OpenBoardView or a similar viewer. Check that the board code and revision match before using it.
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 @cynetitsolution. Enginerys does not host this file.
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Compressed archive that every operating system opens without extra software.