Re: lenovo yoga 500-141BD power goes off a few sec
The same issue , the same model.
In pin 18 at ISL95520HRZ is one resistor 10 ohm.
In found this resistor with big resistance,about 80k ohm.
On pin 18 shoul be about 19v but was just 16v.
PR743=10 ohm on Compal LA-D071P.
Re: lenovo yoga 500-141BD power goes off a few sec
Yap you are good. I have board lt41-14271 YOGA with the same chip PIN 18, VERY LOW VOLTAGE (must be DCin adapter or battery). I found bad resistor (PR4437) 2.2 ohm.
Re: lenovo yoga 500-141BD power goes off a few sec
The low resistance may be normal and is for a current sense resistor. Can you link a schematic if you have one?
Which pin has this resistor?
Yes, the dcin should not be low. Remove all power and review to locate mosfets that will be nearby. The mosfets are like solid state relays that pass the voltage from your dcin adapter to this ic but only if the gate pin is the correct voltage.
Share full details of the mosfet markings so we can check if the mosfets are N-channel or P-channel.
Which logic board are you repairing? Post all details.
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