#1 Asus Vivobook Pro 14X M7400Q it does nothing and there is no consumption
von Zemog • 23 April 2025, 14:18
Hello
I have an Asus Vivobook Pro 14X M7400Q with an M3500QA R2.1 motherboard. When the power is connected, it does nothing and there is no power consumption.
I was able to get the boardview, but I couldn't find the schematic.
With the motherboard removed and nothing connected, I have a short on the following coils:
PL8702 (+3VSUS), PL8301 (+0.75VSUS), PL9201/PL9202/PL9203 (+NVVDD), PL8401 (+1.8VSUS), PL8105 (+VDDCR_SOC)
If I connect the power supply to A/D_DOCK_IN, I get 20V, and AC_BAT_SYS gets 8.35V.
I've opened the PL8702 coil (+3VSUS), injected voltage, and with 1.6V, the current draws 1.90A, but I don't detect excess heat in any component. The other coils are 0V.
Any suggestions?


I have an Asus Vivobook Pro 14X M7400Q with an M3500QA R2.1 motherboard. When the power is connected, it does nothing and there is no power consumption.
I was able to get the boardview, but I couldn't find the schematic.
With the motherboard removed and nothing connected, I have a short on the following coils:
PL8702 (+3VSUS), PL8301 (+0.75VSUS), PL9201/PL9202/PL9203 (+NVVDD), PL8401 (+1.8VSUS), PL8105 (+VDDCR_SOC)
If I connect the power supply to A/D_DOCK_IN, I get 20V, and AC_BAT_SYS gets 8.35V.
I've opened the PL8702 coil (+3VSUS), injected voltage, and with 1.6V, the current draws 1.90A, but I don't detect excess heat in any component. The other coils are 0V.
Any suggestions?

