For the Biostar H61MGV3 Ver. 8.0, a complete text-based schematic is not publicly available as these are proprietary documents typically released as PDF files or boardview files.
Schematic diagnosis:
VCORE Rail Failure: The H61 chipset boards often suffer from VRM controller issues. Use a multimeter to check for voltage at the inductors near the CPU socket. h61mgv3 ver 8.0 schematic
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Before diving into the circuit diagrams, it's important to understand what the H61MGV3 Ver 8.0 is managing: Socket: LGA 1155 (Supports i3/i5/i7 2nd & 3rd Gen). Chipset: Intel H61. Memory: 2 x DDR3 DIMM slots (Up to 16GB). Expansion: 1 x PCI-E x16 3.0 Slot (with Ivy Bridge CPU). Power Design: Typically a 3+1 or 5-phase VRM layout. Understanding the Schematic Layout For the Biostar H61MGV3 Ver