ECS KBLU-AU board documentation at revision 1.0, stored as a 1.55 MB RAR archive. The name provides only the board code and revision; a schematic set is the usual content, though that is not confirmed. A technician would open the extracted pages to follow the power-up sequence, measure rails at named test points and find the controller or MOSFET responsible for a missing voltage. Use 7-Zip or WinRAR to extract, and check that KBLU-AU and Rev 1.0 appear on the PCB silkscreen before relying on component values.
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 @IT_SERVICE_WORLD. 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.