Gigabyte GA-H61M-DS2 Motherboard Repeatedly Powered On And Off

 Motherboard Model- Gigabyte GA-H61M-DS2

 Fault -The Motherboard Is Powered On And Off Repeatedly

 Repair Process:

    I received Gigabyte GA-H61M-DS2 motherboard. It was powered on and off repeatedly. I plugged in the buzzer and unplugged the memory, but it was still powered on and off repeatedly.

First, measure the working conditions of the motherboard. The results are as follows:

·        Tested that the memory power supply is 1.5v and it is normal;

      When measuring the bridge power supply, 1.8V is normal;

·        When measuring the CPUVTT voltage, it is 1.05V, which is normal;

·        The VCCSA voltage measured at 0.93V is normal;

·        The CPU power supply measured at 0V is abnormal.

Open the drawing and find the CPU chip.

The VDD test is normal, and then the 9-pin VTTPWRGD open pin has no voltage. Continue to find the connected points, find Q40 and Q18, and test the Q40 G pin for high and low transitions.

Q18 G pole has no jump and is always at high voltage.

The G pole of Q18 is controlled by Q19, and the B pole of Q19 is measured to have high and low jumps.

However, there is no jump in the C pole, and Q19 is obviously damaged. It will be repaired after replacing Q19.

Power on, connect the screen and test, everything is normal, troubleshooting, and the repair is over.

Happy Repairing !!