RAR archive for the Dell Inspiron 3446, also labelled with the number 13302, which resembles a Wistron-style board number; confirm it against the PCB marking. The 3.68 MB archive likely holds a schematic or boardview, but the name does not list its contents, so extract it with a tool such as 7-Zip or WinRAR. Once opened, the files help trace rails, locate test points and find components on shorted nets. Verify the board number and revision match the mainboard before relying on the data.
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 @ITHINKHS. 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.