GA-P41T-D3P Shutdown changes to automatic restart repair

GA-P41T-D3P shut down auto restart and replaced rn10 directly. After replacement, the fault was repaired.

Machine model: GA-P41T-D3P Rev: 1.3

The fault phenomenon is: turn off auto restart, the first plug-in does not automatically power on, as long as you press Switch, you will never shut down, turn off the restart, only pull out the power line.

GA-P41T-D3P Shutdown changes to automatic restart repair Figure 1.

Maintenance process: according to this phenomenon analysis,VCC,CLK and reset should be normal.Because it can enter the system, no crash, no blue screen.Only when the machine is shut down, it will restart and power off. The machine will be powered on again one second after the power is cut off.I feel like a signal wakes up the motherboard.When it comes to wake-up, I immediately think of the wake signal.Open the Xinzhizao Soft drawing, which is named – PCIe wake. It is connected with the South Bridge, the network card chip and the PCIe slot. There is also a 822 drain block of rn10.

GA-P41T-D3P Shutdown changes to automatic restart repair Figure 2.

Power on to measure the state of the PCIe wake. It is always 3.3V when it is turned on. It will change to 0.3V immediately after the power is turned off, and it will return to 3.3V as soon as it is powered on. It seems that auto restart is caused by this signal.Because the system is normal, do not move the south bridge network card chip, directly replace the rn10. After the replacement, the system will not restart after power failure. Finally, the location of the last rn10 is shown.