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ASUS X540UP notebook does not trigger common fault repair
machine model:ASUS X540UP
ASUS X540UP notebook does not trigger common fault repair Figure 1.
Fault phenomenon: no switch, no response according to Switch.
Maintenance process: check the EC condition is normal. According to Switch, the height is current of change. In fact, I am also a novice. Under the guidance of brother Xie Feng (the most handsome boy in the maintenance department), it is abnormal to find the bridge according to his instructions.
ASUS X540UP notebook does not trigger common fault repair Figure 2.
DSW_The pwrgo signal is normally 3.3V, and only 0.78-0.79v can be found from the point.
ASUS X540UP notebook does not trigger common fault repair Figure 3.
Check the signal pull-up VCC is normal, then there is only one reason, that is, there is a component to pull the VCC low.According to this clue, the components connected to the ground were disassembled one by one, and it was found that one Capacitor C2505 was pulled down.
ASUS X540UP notebook does not trigger common fault repair Figure 4.
Later, I checked the forum and found that there are many examples of the same phenomenon. This model is common failing!Give me another positive location.
ASUS X540UP notebook does not trigger common fault repair Figure 5.
Finally, the picture is illuminated.
ASUS X540UP notebook does not trigger common fault repair Figure 6.
ASUS X540UP notebook does not trigger common fault repair Figure 7.
