This is the classic H67 issue. Check the following:
If you only need specific settings (e.g., CMOS clear, fan headers, RAM limits), provide those details and a concise pinout or instruction can be extracted directly from the service guide. acer h67h2 ad motherboard manual
is a specialized LGA 1155 motherboard often found in OEM desktop systems like the series . While it was manufactured by ECS (Elitegroup Computer Systems) for Acer, finding a standalone manual can be difficult since it was primarily distributed as a pre-installed component. This is the classic H67 issue
If you are trying to rebuild this board outside of the original Acer case, the most frustrating part is connecting the power button, reset button, and LEDs. The front panel header is usually located at the bottom right of the board. While it was manufactured by ECS (Elitegroup Computer