Gigabyte f2a85xm-hd3 motherboard reset light does not run code

Motherboard version number: Gigabyte f2a85xm-hd3 Rev: 1.0
Fault phenomenon: the reset lamp of the main board does not run out of code
Maintenance process:

A gigabyte f2a85xm-hd3 motherboard, on the test bench, test reset light flash does not run code.Other large VCC was normal without vdda 2.5V VCC.

Gigabyte f2a85xm-hd3 motherboard reset light does not run out of code Figure 1.
Vdda25 is output by 5 pin chip Q62, test 5 pin to ground Diode value is normal, replace Q62, the fault is solved.

Gigabyte f2a85xm-hd3 motherboard reset light does not run out of code Figure 2.
740k CPU plus graphics card, run code normal light, but open several times, after a period of time directly no power on.The rsmrst 0V of good standby signal is abnormal.

Gigabyte f2a85xm-hd3 motherboard reset light does not run out of code Figure 3.
Find pr91 next to BIOS, remove pr91 and measure 3.3V IO terminal 0V at south bridge end.The IO end to ground diode value is also very low, direct replacement of IO fault is still the same.See IO next to a small 5 pin chip oq2 is Io VCC.

Gigabyte f2a85xm-hd3 motherboard reset light does not run out of code Figure 4.
The VCC and en of oq2 are normal, the output is not normal, only 2.2V, normal 3.3V, oq2 is also broken.

Gigabyte f2a85xm-hd3 motherboard reset light does not run out of code Figure 5.
Replace the small 5 pin chip, oq2 5 pin normal output 3.3V.

Gigabyte f2a85xm-hd3 motherboard reset light does not run out of code Figure 6.
IO 116 pin rsmrst also returned to normal 3.3V.After several times of maintenance, the fault was solved and the test was finished.