Gigabyte ga-p61-s3 mainboard automatic restart repair

Gigabyte ga-p61-s3 mainboard automatic restart repair

Motherboard model: Gigabyte GA-P61-S3 Motherboard
Malfunction: motherboard auto restart

Gigabyte ga-p61-s3 mainboard automatic restart repair Figure 1.

Maintenance process:
A Gigabyte GA-P61-S3 motherboard has no problem in appearance. According to experience, the IO should be replaced for this kind of shutdown and restart failure. The model is IT8728F EXS version.

Gigabyte ga-p61-s3 mainboard automatic restart repair Figure 2.

After replacement, the startup and shutdown are still the same. Keep checking and find that Switch pin has a 6 pin ESD chip. Just remove it.

Gigabyte ga-p61-s3 mainboard automatic restart repair Figure 3.

Plug in the 24P power supply, and the fault remains the same! Replace the network card, the model is 8111F.

Gigabyte ga-p61-s3 mainboard automatic restart repair Figure 4.

Plug in the 24P power again, but it still doesn’t work! Carefully observe the motherboard, remove the serial chip, and plug in the 24P power supply again, but it still doesn’t work!

Gigabyte ga-p61-s3 mainboard automatic restart repair Figure 5.

Open Xinzhizao Soft to check the drawings, and check the USBOC signal to find UR72,3.3V, which is normal.

Gigabyte ga-p61-s3 mainboard automatic restart repair Figure 6.

UR276,1.2V, abnormal, 3.3V under normal circumstances.

Gigabyte ga-p61-s3 mainboard automatic restart repair Figure 7.

It is a 15K and 8.2K resistor, and VCC is normal after replacement.

Gigabyte ga-p61-s3 mainboard automatic restart repair Figure 8.

Plug in the 24P power supply again, conduct the power-on test, the boot is normal, the fault is eliminated, and the maintenance is over.

Gigabyte ga-p61-s3 mainboard automatic restart repair Figure 9.