RAR archive of 46.6 KB for motherboard 08628-1, following the Wistron pattern, and the substantial version compared with the 1.05 KB copy of the same number. Contents are not named, nor are brand and model; the size suits a compact boardview file. After extraction, open a layout in OpenBoardView or FlexBV to find components, nets and test points while tracing faults. Check that the PCB is marked 08628-1, as the neighbouring 08627 boards are separate designs.
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 @cyberlanelectonik. 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)