ECS MCP61M-M3 desktop motherboard documentation packed as PDF in a RAR archive of about 1013 KB. The board name refers to an NVIDIA MCP61-based micro-ATX design. No revision is given in the file name, so compare the details against the version printed on your PCB. The PDF most likely contains schematic or layout pages. Use it to trace power rails, the CPU VRM and chipset supplies when diagnosing no-power, no-POST or short-circuit faults on this older platform.
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 @BoardSchematic. 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)