RAR archive for the PLF, PLR, CSF and CSR mainboard in its DSC version, meaning discrete graphics, at revision 2.1. At 1.57 MB it likely contains a schematic; the name does not give the brand or ODM. The discrete variant adds a GPU and VRAM power stage absent from the UMA board, so pick the version matching your hardware. Verify the revision on the PCB, then use the document to trace GPU and CPU rails, locate components and check suspected shorts.
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 @alischematics. 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.
7-ZipWinRARThe Unarchiver (macOS)