lenovo y520 confused

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  • darkness77
    Member
    • Dec 2019
    • 10
    • Craotia

    #1

    lenovo y520 confused

    First i am noob

    Second, i received this laptop, it was powering on but no display. I found that +1.2 v is missing. Then i found that +1.2V_S5 is shorted to ground. I removed and replaced RT8231AGQW and short was gone.
    But...on PR1418 i have resistence 85 kohm and that resistor is 100 kohm. So i replaced it but again 85 kohm. Then i removed resistor and found out that resistence between those two lines (GND and +1.2V_VID) is more then 100 kohm, putting multimeter probes both way...but with resistor is 85 kohm??? how is that possible? i checked 5 times and resistors are good, outside circuit they show exactly 100 kohm.
    Can someone explain to me how is this possible? thx


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  • mcplslg123
    Badcaps Legend
    • Jun 2015
    • 7262
    • india

    #2
    Re: lenovo y520 confused

    In circuit resistance will read different as lots of components are attched on a single rail. If the resistor is measuring correctly out of circuit, thats fine and you need to move on further.

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