Specialized electronics repair forums such as Badcaps.net , Vinafix , or Bios-Chip24 are the most reliable archives for downloading verified engineering schematics and verified working BIOS dumps for Ver 8.0 layouts.
1 x PCI-E 3.0 x16 Slot (Note: PCIe 3.0 speed requires an Ivy Bridge CPU). 1 x PCI-E 2.0 x1 Slot. 4 x SATA II (3Gb/s) connectors. I/O & Connectivity h61mgv3 ver 8.0 schematic
The H61 chipset frequently suffers from BIOS corruption, preventing the board from posting. Locate the 8-pin SPI Flash IC on your schematic (usually labeled Winbond or Macronix). Verify that pin 8 receives +3.3V_SPI and pin 1 receives the chip select ( CS# ) signal. Step-by-Step Diagnostic Workflow Using the Schematic Specialized electronics repair forums such as Badcaps
What do you have available (multimeter, oscilloscope, or BIOS programmer)? 4 x SATA II (3Gb/s) connectors
Intel LGA 1155 socket, supporting 2nd and 3rd Generation Intel Core i7, i5, i3, Pentium, and Celeron processors.
If a free schematic is not available, you may need to use the other resources in the table above in combination or purchase a repair guide from a commercial service that hosts detailed schematics and boardview files.