Asus X450C No Power (5V Problem)

Board ID : X450CC Rev 2.0 tmt YA-4A 1 94V-0 E114139

3.3V 5V section problem. 3.3V is ok. 5V line have only 2.2V and not power on. Sometimes 3.3V and 5V all ok and power on. Please help me to find the fix.

I think that with such a voltage, something should be warming up, first it is necessary to remove the jumper or inductor of the 5 volt line and replace the voltage, then if the resistance is low, apply voltage with a limit to the current of 0.5 A and 2-3 volts and check that it is heating

Be sure to check the USB, maybe the USB jack has crumbled.

I resolder joints on all pins of KBC chip and now it's running OK.