H61mgv3 - Ver 8.0 Schematic

Look for the timing chart. This tells you the order in which voltages (e.g., +3VDUAL, +1.05V_PCH, VCCSA) must turn on.

Verify the communication between the SPI Flash chip and the chipset. Common Troubleshooting Steps for Ver 8.0 h61mgv3 ver 8.0 schematic

What are the ? (e.g., fans spin then stop, no display, or completely dead?) Do you have a multimeter or an oscilloscope available? Look for the timing chart